Best Bidet Toilet for Smart Hygiene & Comfort

Low water pressure and splashback often turn a simple bathroom visit into a frustrating mess. Many bidet toilets promise cleanliness but end up delivering weak flushes or uncomfortable seating, leaving users stuck between inconvenience and poor hygiene.

The best bidet toilet must combine powerful flushing, adjustable cleansing settings, and hands-free operation to truly elevate bathroom hygiene and comfort.

Most conventional bidet toilets fall short by either wasting water, lacking customizable features, or missing essential touchless controls. The following breakdown reveals models that hit those marks, blending innovation with practical performance.

Exploring the Best Bidet Toilet Options for Ultimate Bathroom Comfort

Experience innovation and hygiene with cutting-edge bidet toilets designed to combine powerful flushing, water efficiency, and smart technology for a superior bathroom upgrade.

Loupusuo Smart One-Piece Toilet with Auto Sensor Flush and Adjustable Heated Seat

Powerful flushing that conserves water without compromising on cleanliness often feels like an impossible balance, yet Loupusuo nails this with a system that uses just over a gallon per flush. Its emergency flush feature ensures dependable performance even during outages, safeguarding against inconvenient disruptions.

Automatic lid operation paired with sensor-controlled flushing creates a touchless experience that elevates hygiene standards by reducing contact points. The toilet also pre-moistens, offering a fresher and cleaner sensation from the moment you sit down.

Adjustable cleaning modes allow you to fine-tune the nozzle position and pressure to your preference, whether for posterior wash, feminine care, or massage. Controlled remotely, these settings guarantee personalized comfort and thorough cleansing.

Enjoy a luxuriously heated seat with four temperature levels visible via an intuitive LED display, plus a built-in warm water sprayer that enhances comfort, especially in colder climates. Nighttime navigation is made easier with a gentle night light, and the automatic lid closure minimizes noise disturbance.

Loupusuo’s smart toilet is designed at a height that eases sitting and standing, making it practical for a wide range of adults and seniors. Installation is straightforward with clear manuals and video guides, empowering you to upgrade your restroom experience without professional help.

Best for: Those who desire advanced hygiene features combined with energy-saving flushing and effortless, customizable cleaning options.

Pros:

• Efficient low-water consumption flushing system with emergency backup
• Sensor-driven automatic lid and flush mechanisms ensuring hands-free operation
• Multiple adjustable cleaning modes for tailored personal hygiene
• Comfort-enhancing heated seat and water temperature controls
• Integrated night light and quiet automatic lid closure

Cons:

• Installation may need moderate space and a nearby power outlet
• Automatic flushing sensitivity might require adjustment for some users

WOODBRIDGE Advanced Smart Toilet with Foam Shield, Heated Seat and Auto Flush

Enjoy the ease of hands-free hygiene with a toilet that senses your presence to open and close its lid automatically. Equipped with a foot sensor, this unit elevates the bathroom experience by reducing contact and improving cleanliness.

Comfort is enhanced by an ADA-compliant chair height, ideal for anyone who finds standard toilets tough on the knees. Its one-piece porcelain design not only offers a sleek look but also facilitates effortless cleaning.

Experience refreshing cleanliness through integrated front and rear washing functions, which are adjustable for water pressure and filter purity. Complemented by a bidet dryer that oscillates with customizable airspeed settings, it efficiently reduces the need for toilet paper.

A unique foam shield suppresses splashing and neutralizes odors by automatically generating cleansing foam upon sitting. The highly rated flush system delivers powerful and efficient waste removal with dual flush options boasting a top-tier 1000 gram performance score.

WOODBRIDGE backs this model with global certifications and a US-based support team, ensuring reliable assistance and quality you can trust in a modern bathroom upgrade.

Best for: Individuals seeking a hygienic, eco-friendly bathroom solution with advanced automation and comfort-focused features.

Pros:

• Smart sensing auto lid open/close for touchless operation
• Comfort-height chair design suitable for mobility challenges
• Powerful dual flush system with 1000g MaP score
• Adjustable front and rear bidet washing with warm air drying
• Foam shield technology for odor and splash control

Cons:

• Remote control may require familiarization for new users
• Advanced features might take time to fully customize

EPLO U8MAX Smart Toilet with Auto Lid, Heated Seat & Advanced Foam Shield Technology

Transforming daily routines, the EPLO U8MAX redefines bathroom efficiency with an impressive 1000 gram MaP flush score that ensures powerful waste clearance while keeping water consumption low. Its quiet, smooth flushing creates a serene atmosphere, eliminating the disruptions common in peak household hours.

Experience the innovative Foam Shield, designed to control splashback and minimize residue buildup, significantly reducing cleaning efforts. This feature offers a notably fresher, more hygienic space with every use, making bathroom upkeep less of a chore.

Accessibility meets comfort at 17.41 inches seat height, compliant with ADA standards. This design lessens strain on knees and back, catering thoughtfully to seniors and individuals with mobility considerations, enhancing ease in sitting and standing.

Convenience advances through its hands-free operation where sensors detect presence to open and close the lid and activate flushing, complemented by a foot sensor option. The built-in bidet provides customizable wash settings for enhanced cleanliness with adjustable water pressure, temperature, and spray positioning that feels like a personal spa treatment.

Additional features include a heated seat adapting to ambient temperatures, warm air dryer, air deodorizer, and energy-saving dual flush modes, all incorporated into a sleek one-piece, oval ceramic design that elevates your bathroom’s aesthetic and functionality. The EPLO brand seamlessly integrates smart technology for a refined, user-centric experience.

Best for: Homeowners seeking a modern, accessible toilet that combines efficient flushing with advanced cleansing comfort and smart hands-free convenience.

Pros:

• Powerful yet quiet flushing with high MaP performance
• Foam Shield minimizes splashback and bowl stains
• ADA-comfort height supports ease of use for all
• Customizable bidet wash with temperature and pressure control
• Auto open/close lid and flush with foot sensor feature

Cons:

• Installation may require professional assistance for optimal fitting
• Electric power specifications might need adaptation outside North America

HOROW T38 Smart Toilet with Heated Seat, Auto Lid, and Powerful Flushing System

Experiencing bathroom upgrades where comfort meets innovation transforms daily routines. The HOROW T38 adopts an advanced flushing mechanism powered by an integrated water tank and pump, delivering a vigorous cleanse that ensures no residue remains after each use. This dynamic performance stands out especially in households with low water pressure.

Equipped with intelligent sensors, the seat lid responds to your presence with hands-free automatic opening and closing, adding an elegant touch to effortless hygiene. Adjusting to your preferences is simple thanks to customizable water temperature, pressure, and nozzle positioning, turning cleansing into a gentle spa-like experience.

Nighttime visits are enhanced through a soft night light and vivid digital display, illuminating without overwhelming and supporting your comfort even in the dark. The polypropylene seat remains cozy with a , and drying happens via a refined warm air function, eliminating the need for toilet paper.

Designed for convenience, installation includes all necessary hardware, complemented by responsive HOROW support ready to assist. The toilet’s durable ceramic body and floor-mount design bring reliability alongside cutting-edge features for modern lifestyles.

Best for: Homeowners aiming to combine technology with daily wellness for a cleaner, comfortable bathroom routine.

Pros:

• Powerful flushing that works efficiently even with low water pressure
• Automated seat lid opens and closes with proximity sensing
• Adjustable bidet functions including warm water and nozzle positioning
• Integrated night light and digital display for easy nighttime use
• Heated seat and warm air dryer for added comfort

Cons:

• Power-dependent flush may require backup options during outages for continuous use
• The weight and installation complexity suggest that professional assistance might be helpful

EPLO Smart Toilet iX7 MT with Heated Seat, Jet Flush, and Remote Control

Balancing comfort with innovation, this sophisticated toilet integrates advanced cleansing features discreetly within an elegant elongated design. Equipped with continuous warm water supply and a high-speed adjustable dryer, it elevates personal hygiene routines without the awkward cold-water surprise often found in lesser models.

Automatic functions include versatile flush options like foot-kick, remote control, and off-seat auto flush, providing hands-free convenience tailored to modern bathroom needs. The ambient night light and LED temperature display enhance usability in low light, ensuring a seamless experience at any hour.

This unit sits at a comfortable chair height, easing the effort of sitting and standing, an often underestimated comfort upgrade. Built with tankless siphonic jet flushing technology, it balances water efficiency and powerful cleansing circulation.

Every material choice, from the durable ceramic bowl to the stainless steel nozzles, ensures longevity and hygienic performance. The EPLO brand reputation for attentive customer service complements the high-tech features, promising reliable ongoing support.

Best for: Homeowners seeking a luxurious, hands-free bathroom upgrade with customizable cleansing and comfort settings.

Pros:

• Instant warm water with temperature control for a soothing wash
• Multiple flush activation methods including remote and foot kick
• High-speed adjustable warm air dryer for complete drying
• Comfort height design easing transitions from sitting to standing
• Soft close seat and lid with convenient night light guide

Cons:

• Installation may require minor adjustments depending on existing plumbing setup
• The remote control’s battery dependence might need occasional attention

Luoware Smart Toilet with Heated Bidet Seat, Auto & Foot Sensor Flush, LED Night Light

Imagine upgrading your bathroom with an appliance that effortlessly combines hygiene, comfort, and modern design. The Luoware Smart Toilet delivers a sophisticated cleansing experience with a built-in bidet offering instant warm water and customizable spray options including rear, feminine, and massage washes. Adjustable temperature and pressure ensure a precise and gentle cleanse every time.

Equipped with a heated seat and warm air dryer, this model provides soothing comfort even during chilly mornings or winter months. Its hands-free flushing system—featuring foot sensing, remote, and automatic off-seat flush—keeps your bathroom more sanitary by eliminating unnecessary contact.

Designed with efficiency in mind, the unit includes a built-in tank and booster pump that produce a powerful yet quiet flush requiring just over a gallon of water, ideal for homes with lower water pressure. The sleek one-piece ceramic construction features a soft-close manual lid and a practical LED night light that gently illuminates your path without disturbing your eyes.

Backed by responsive American customer support, this smart toilet from Luoware stands out for its balance of advanced features and reliable performance. Its compact dimensions fit most standard bathrooms, ensuring an easier upgrade without complex remodeling.

Best for: Homeowners seeking a hygienic, comfortable, and modern bathroom solution that enhances daily routines with user-friendly smart features.

Pros:

• Multiple wash modes with adjustable temperature and pressure
• Hands-free flush options including foot sensor and remote control
• Built-in tank and booster pump for powerful, quiet flushing
• Heated seat and warm air dryer for enhanced comfort
• LED night light provides gentle bathroom illumination

Cons:

• Manual lid may not suit those preferring fully automatic closure
• Flush noise might be noticeable in quieter environments for some users

EPLO E18 Smart Bidet Toilet with Powerful Flush and Heated Seat – Modern Elongated Design

Achieving cleanliness and comfort in your bathroom can be a delicate balance. EPLO’s smart toilet leverages a built-in booster pump to deliver a powerful, consistent flush, even in homes facing low water pressure challenges. Its advanced design ensures this strength doesn’t diminish over time, keeping your toilet reliably efficient day after day.

The foam shield technology transforms hygiene by creating an airtight barrier that blocks splashback and prevents waste adhesion, reducing cleaning efforts significantly. For intuitive convenience, off-seat and foot-sensor flushing allow hands-free operation, eliminating awkward bending or contact.

Experience a personalized cleanse with multiple wash modes including front, rear, and pulsating options. EPLO’s intuitive controls let you adjust water temperature, pressure, and nozzle placement, while an auto deodorizer maintains fresh air in your bathroom environment.

Eco-conscious features like a dual flush system and warm air dryer cut waste and power consumption, demonstrating a commitment to sustainability without compromising performance. Certified for safety and efficiency, this sophisticated unit elevates everyday bathroom use with thoughtful innovations.

EPLO integrates style and smart functionality into an elongated, one-piece ceramic design, making it as visually appealing as it is practical.

Best for: Homeowners who value advanced hygiene, hands-free operation, and eco-friendly water-saving technologies in a sleek, modern bathroom fixture.

Pros:

• Strong flush powered by booster pump for reliable performance
• Foam dispenser prevents splashback and keeps bowl cleaner longer
• Multiple wash modes with adjustable temperature and pressure
• Hands-free flushing with off-seat and foot sensor options
• Energy-saving dual flush system and warm air dryer reduce waste

Cons:

• Remote control lacks backlighting, which might affect nighttime use for some
• Flush noise may be noticeable during quiet nighttime hours

CANEST Smart Toilet with Built-In Bidet and ADA Comfort Height, Heated Seat & Night Light

Finding a solution for a hands-free, hygienic bathroom experience can transform your daily routine. The CANEST model redefines convenience by integrating an automatic lid that responds to proximity and a foot kick sensor for effortless seat lifting. This dual-control system eliminates hand contact, enhancing cleanliness with every use.

Featuring a quiet yet powerful siphonic jet flush, this system manages waste efficiently while maintaining a low noise profile to avoid disturbances. Built with an ADA comfortable chair height of 17 inches, it supports elder users and those seeking ergonomic comfort without compromise.

Experience the refreshing difference of its warm front and rear washing functions equipped with adjustable nozzle positioning and temperature settings. The fast dry option uses gentle warm air, limiting the need for paper and supporting an eco-conscious lifestyle. The built-in self-cleaning nozzle further ensures hygienic use without extra maintenance.

Winter mornings transform with a heated seat adjustable between 86℉ and 100℉, while the gentle night light guides you discreetly in the dark. Dual flush options conserve water by detecting usage intensity, paired with a deodorizing system that leaves your bathroom air fresh post-use. These thoughtful features, enabled through an intuitive wireless remote and a clear LED display, highlight the advanced design CANEST applies to smart bathroom solutions.

Best for: Homeowners looking to enhance bathroom hygiene and comfort with technology tailored for accessibility and sustainability.

Pros:

• Automatic lid and seat operation via motion and foot sensors for a touchless experience
• Powerful and quiet dual-flush system with a high flushing score for reliable waste removal
• Customizable warm water wash and drying for thorough cleaning and reduced paper use
• Heated seat with adjustable temperature increases comfort, especially in cold conditions
• Built-in night light and deodorizer maintain a pleasant and convenient bathroom atmosphere

Cons:

• Installation might require careful handling due to heavier ceramic build
• Advanced features could have a learning curve for first-time smart toilet users

AKNIRL Smart Toilet with Built-In Bidet and Heated Seat for Ultimate Comfort

Upgrading your bathroom routine becomes effortless with features designed for personalized hygiene. Adjustable wash modes—including posterior and feminine options—customize your cleanse with fine-tuned water temperature, pressure, and nozzle positioning, offering a tailored bi-directional wash experience. Accompanied by a heated elongated seat with multiple temperature levels, comfort extends beyond cleanliness.

Powerful flushing is assured even in low-pressure water systems through an integrated booster pump. Touchless options such as a pre-wet feature, foot sensor activation, and off-seat flush add hands-free convenience, minimizing contact points and enhancing sanitation. The toilet’s warm air dryer further completes the hygienic cycle with gentle drying.

Maintaining a fresh environment, the built-in deodorization system actively purifies air during use while a subtle night light aids visibility without disturbance. The sleek, tankless ceramic design blends modern aesthetics with space-saving functionality, complemented by an intuitive remote control for seamless operation.

AKNIRL’s smart toilet offers an elegant, technology-driven bathroom solution that intelligently combines comfort, hygiene, and style into one compact unit.

Best for: Individuals and families seeking a high-tech, customizable hygiene upgrade with easy-to-use features and space-conscious design.

Pros:

• Customizable wash modes with adjustable water settings
• Booster pump ensures strong flushing in any water condition
• Heated seat and warm air dryer for enhanced comfort
• Hands-free flush options improve sanitation
• Deodorization and night light improve bathroom atmosphere

Cons:

• May produce noticeable flushing noise for some users
• Replaceable pump part may be difficult to source independently

Quick Guide: Top Bidet Toilet Feature Analysis

Product Name	Material	Dimensions (D x W x H)	Flush Type & Water Use	Special Bidet Features
Loupusuo Smart Tankless	Ceramic	26.77″ x 16.54″ x 20.87″	Pressure Assist, Siphon Jet; 1.26 gal/flush	Adjustable 5 nozzle positions, massage mode, warm air dryer with 4 temp levels, auto lid open/close, emergency flush
Woodbridge SB-1000	Porcelain	27.63″ x 16.53″ x 19.75″	Siphonic Jet; Dual Flush 1.6/1.1 GPF	Foam shield, foot sensor, oscillating wash, movement drying with 3 airspeed levels, auto open/close lid
EPLO U8MAX Bidet	Ceramic	27.63″ x 16.14″ x 19.68″	Siphonic Jet; Dual Flush 1.6/1.1 GPF	Foam shield, adjustable water pressure/position, auto open/close lid, warm air dryer, deodorization
HOROW T38 Artistic	Ceramic	27.4″ x 15.4″ x 18.7″	Automatic flush; 1.1 gal/flush	Built-in bidet, instant warm water, warm dryer, auto open/close lid, night light, deodorization
EPLO iX7 MT	ABS & Ceramic	27.2″ x 16″ x 18.8″	Siphonic Jet; Dual Flush 1.28 gal/flush	Kick flush, automatic flush, LED temp display, heated seat, high-speed dryer, night light
Luoware LW-S01 Manual Lid	Ceramic	26.8″ x 15.7″ x 17.5″	Booster pump & tank; Dual Flush Smart Toilet 1.03 gal/flush	Rear/feminine/massage wash, adjustable spray settings, warm air dryer, foot sensor flush, battery backup for outage
EPLO E18 Bidet Tank	Ceramic	27.16″ x 16.14″ x 19.01″	Booster pump with tank; Dual Flush 1.6/1.1 GPF	Foam dispenser, adjustable water temperature & pressure, auto deodorization, off-seat flush, remote control
CANEST FC-001 Smart Toilet	Ceramic	27.2″ x 16.2″ x 17.4″	Quiet siphonic jet; Dual Flush 1.6/1.1 GPF	Oscillating wash, foam dispenser, heated seat 86°F-100°F, LED temp control, soft-close lid, remote control

How to Choose the Right Bidet Toilet for Your Bathroom Needs?

The perfect bidet toilet balances hygiene, convenience, and water efficiency. Several key features define whether a model really works or just looks good on paper.

Flush System & Water Consumption

A toilet’s flush system controls how well waste clears while managing water use. Pressure-assist and siphonic jet flush types offer different levels of power and efficiency. Many modern models use less than 1.3 gallons per flush, balancing performance with conservation.

Take the Loupusuo model, for example. It combines pressure-assist flushing with siphon jet technology, delivering a strong flush at just 1.26 gallons per flush. This mix helps clear waste effectively without wasting water.

Picking a flush system that saves water yet handles waste well means fewer clogs and less need for double flushing. This choice leads to lower utility bills and a smoother bathroom experience overall.

Bidet Features & Customization

Bidets come with a range of features, from simple sprays to sophisticated multi-position nozzles with massage settings. Key options like adjustable nozzle positions, spray pressure, and temperature control play a big role in comfort and hygiene.

The Loupusuo smart toilet stands out by offering 5 nozzle positions, a massage mode, and 4 temperature levels. These allow users to customize each wash for a thorough, comfortable cleanse. Without such controls, many end up with less effective cleaning or awkward experiences.

Choosing a bidet with rich customization means you get a wash that fits your body and preferences. This leads to better hygiene, increased comfort, and greater satisfaction every time you use it.

Hands-Free Operation & Sensors

Automatic lids, flushing, and seat sensors help cut down on germs by reducing touchpoints. Foot-activated flush and proximity sensors make using the toilet more hygienic and convenient.

WOODBRIDGE uses a foot sensor plus an auto lid open/close feature to limit germ exposure. EPLO models take it further with fully automated lids and automatic flushing. These smart features mean you don’t have to touch any handles, which is especially useful in shared or public bathrooms.

Without these sensor technologies, you’re more likely to come into contact with bacteria on handles or surfaces. This increases contamination risk and undermines the cleanliness advantages of a bidet toilet system.

Seat Comfort & Heating

Heated seats with adjustable temperature settings make bathroom visits much more pleasant, especially when it’s chilly. Multi-level warm seats and ergonomic designs boost overall comfort and encourage regular use.

Models like the EPLO U8MAX and HOROW T38 combine heated seats with warm air dryers, creating a cozy experience. Without these features, bidet use can feel cold and uninviting, particularly in winter months.

Ignoring seat warmth often results in discomfort, which can reduce the desire to upgrade to a smart bidet. Adding heating ensures a more enjoyable and comfortable bathroom routine year-round.

Cleaning & Maintenance Features

Toilets with foam shields and deodorization help keep your bathroom fresh by reducing splashback and odors. These features make everyday cleanup less of a chore.

Models like WOODBRIDGE and EPLO use foam shield technology to create a barrier that stops residue and splatter from sticking around. The use of porcelain and ceramic materials also boosts durability, making stains easier to wipe away and extending the toilet’s life.

Choosing a toilet without these thoughtful features means you’ll spend more time scrubbing and dealing with unpleasant smells. With the right design, maintenance is simpler, and your bathroom stays cleaner and more inviting. Investing in these features pays off in long-term ease and comfort.

Additional Convenience Features

Extras such as warm air dryers with adjustable speeds, emergency flush options, LED night lights, and remote controls bring added usability to smart toilets. These features enhance daily comfort and accessibility.

For example, Luoware includes a battery backup for power outages and built-in LED lighting, which make nighttime visits safer and more convenient. Meanwhile, the EPLO iX7 MT offers a high-speed dryer and multiple flush settings tailored to different user needs.

Skipping these features can lead to a less seamless experience, limiting the full benefits of a smart bathroom setup.

Frequently Asked Questions

What flush type is best for a bidet toilet?

A siphonic jet flush combined with pressure-assist technology typically offers the strongest waste removal while conserving water. Models like Loupusuo employ this hybrid system, using just over 1.2 gallons per flush without compromising flush power.

The siphonic design creates a vacuum effect that efficiently clears the bowl, while pressure assist boosts flow force. This combo reduces clogs and repeated flushing needs.

Look for toilets specifying both siphonic jet and pressure-assist flush for balanced performance and efficiency.

How important are adjustable bidet spray settings?

Adjustable spray settings such as nozzle position, water pressure, and temperature let you customize your experience for maximum comfort. These features adapt the bidet to fit individual preferences and sensitivities.

For example, Loupusuo provides 5 nozzle positions and temperature controls, allowing precise adjustments. This level of control prevents discomfort and ensures a thorough cleanse every time.

Choosing a bidet with multiple adjustment options guarantees you get personalized hygiene that suits your needs perfectly.

Do sensor features really improve hygiene?

Sensor-based features help reduce direct contact with toilet surfaces, which means fewer germs spread around. Automatic lid opening and foot-sensor flush systems are great examples of this innovation.

Brands like WOODBRIDGE and EPLO offer foot sensors and auto lid functions that cut down on frequently touched surfaces. These technologies keep your bathroom cleaner with less effort.

Opting for models with these sensor features is a smart move to maintain a more hygienic and hands-free bathroom experience.

Is a heated seat necessary for a bidet toilet?

Heated seats bring a cozy touch to bidet toilets, making them especially inviting in chilly weather or during late-night trips. This feature helps users embrace the bidet experience more often.

Some models, like the HOROW T38 and EPLO U8MAX, offer adjustable heat levels and warm air dryers, enhancing comfort and turning routine bathroom time into a soothing break.

Though less essential in warm climates, a heated seat remains a pleasant upgrade that raises overall bathroom comfort and satisfaction.

How do foam shield and deodorizer features affect maintenance?

Foam shield technology creates a protective barrier that limits splashback and reduces residue buildup. Meanwhile, the deodorizer feature works to neutralize unpleasant odors, keeping the bathroom smelling fresh.

Models like WOODBRIDGE and EPLO showcase how these innovations reduce cleaning frequency and make upkeep less demanding. The foam shield helps maintain a cleaner bowl, while the deodorizer ensures a more pleasant environment overall.

Choosing toilets equipped with these maintenance-friendly features means less scrubbing and more consistent freshness in your bathroom space.

Choosing the Perfect Bidet Toilet Transforms Daily Hygiene

Selecting a bidet toilet with a blend of powerful flushing, adjustable cleansing functions, and hands-free sensors closes the gap between ineffective cleaning and uncomfortable bathroom experiences. Smart features like foam shields and heated seats make an immediate difference.

For tight spaces or water-conscious users, models like the Loupusuo with pressure-assist flush fit perfectly, while those seeking maximum comfort should consider elongated designs with multi-level heated seats and warm air dryers. ADA-compliant heights benefit users with mobility concerns.

Careful installation aligned with your bathroom’s water pressure and power availability is essential. Preheating seats, avoiding size mismatches, and understanding sensor controls ensure you get the full benefits without frustration or malfunctions.

Last update on 2026-02-04 / Affiliate links / Images from Amazon Product Advertising API