The Toto® EP Wall-Hung Elongated Toilet with S550e Bidet Seat and DuoFit® In-Wall 1.28 and 0.9 gpf Dual Auto Flush Tank System delivers unparalleled style and performance. The S550e WASHLET® is fully automated, featuring 5 spray settings, auto open and close lid, heated seat, a nightlight, and instantaneous water heating. 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. The self-cleaning wand also uses the advanced EWATER+ to automatically clean before and after every use. The PREMIST function sprays the bowl before each use to prevent waste buildup. The Toto® WASHLET® S550e is operated by a luxury style illuminated touch pad remote with 2 user memory to save preferred settings. The DuoFit® tank provides a WaterSense® certified dual-flush option with Toto®'s Dual-Max® flushing system. The EP bowl features Toto®'s DYNAMAX Tornado Flush®, a hole-free rim design that generates a centrifugal, cyclonic rinsing action with the option of 0.9 or 1.28 gal of water. 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. This wall hung toilet bowl also features Toto®'s CEFIONTECT® 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 DuoFit® harness allows you to select a mounting height of 15 to 19 in. This provides the opportunity for you to establish a comfortable bowl height for a wide array of individuals. The in-wall unit can support up to 880 lb when installed properly. The kit arrives ready to be installed within a 2 x 6 in stud setting with a 2 x 6 in polyethylene waste outlet. If you require installation within a 2 x 4 in setting, you can purchase Toto®'s 2 x 4 in PVC outlet kit (THU343).