The Toto® T40 WASHLET®+ Aquia® IV 2-Piece Elongated Dual Flush 1.28 and 0.8 gph Toilet and Auto Flush Contemporary WASHLET® S550e Bidet Seat is designed to conceal the WASHLET® power cord and water supply hose for a seamless installation. The WASHLET® S550e features Toto®s technologically advanced EWATER+ system which uses electrolyzed water generated by a technologically advanced process, transforming the water into a safe and powerful compound. By misting the bowl after every use, the EWATER+ technology helps to keep your toilet bowl clean and hygienic without any extra harsh chemicals. Toto®s advanced PREMIST technology prevents toilet bowl waste buildup by using incoming water supply to spray the bowl before every use and help keep it clean. The Toto® WASHLET® S550e is operated by a luxury style illuminated touch pad remote with 2 user memory to save preferred settings. The WASHLET® features 5 spray settings, auto open and close lid, heated seat, a night light and instantaneous water heating. The redesigned WASHLET® lid style resides flush with the toilet bowl, providing a streamline look and giving the impression of an integrated system. This minimalistic display provides a more subdued appearance to your WASHLET® and skirted design conceals the trapway, which enhances the elegance and style the toilet. The 1-Piece design is not only aesthetically pleasing, but by removing the gap between the tank and bowl, we eliminate the hiding place for dirt and debris and minimize the frequency of cleanings. The Universal Height design allows for a more comfortable seat position across a wide range of users. The Aquia® IV features Toto®s DYNAMAX Tornado Flush™, utilizing a 360 degree cleaning power to reach every part of the bowl. This version of the Aquia® IV includes CEFIONTECT®, a layer of exceptionally smooth glaze that prevents particles from adhering to the ceramic. CEFIONTECT®, EWATER+ and DYNAMAX Tornado Flush™ create a synergy that optimizes flush performance to reduce the frequency of toilet cleanings, minimizing the usage of water, harsh chemicals and time required for cleaning. The enhanced design of the Aquia® IV inner bowl reduces water flow resistance and turbulence, resulting in a quieter flush. New Auto Flush kit provides a hands-free automatic flush after every use. No need to touch buttons or handles and never worry about someone forgetting to flush. The chrome center-mounted push button that sits atop the tank allows you to proactively conserve water by choosing between a 0.8 gph rinse or 1.28 gph for tougher jobs. The Aquia® IV comes ready for install into a 12 in rough-in, but may be adapted for a 10 in or 14 in rough-in with the purchase of a separately sold adapter. Additional items needed for installation must be purchased separately - wax ring, toilet mounting bolts and toilet water supply lines.