The Toto® Washlet®+ Aquia® IV 1G® Arc Two-Piece Elongated Dual-Flush 1 and 0.8 gpf Toilet and Contemporary Auto Flush Washlet®+ S500e Bidet Seat is designed to conceal the Washlet®+ power cord and water supply hose for a seamless installation. The Washlet®+ S500e features Toto® technologically advanced Ewater®+ system that mists the wand and toilet bowl, reducing the need for harsh cleaning chemicals. Premist® wets the surface of the toilet bowl, aiding in the removal of waste and resulting in a better clean. The Toto® Washlet®+ S500e is operated by a luxury style illuminated touch pad remote with 2 user memory to save preferred settings. The Washlet®+ features 5 spray settings, heated seat and instantaneous water heating. The newly redesigned 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®+. The curved tank design coupled with the skirted bowl create a sophisticated look and minimizes the need to reach behind the bowl to clean in between the nooks and crannies of the exterior trapway. The Universal Height design allows for a more comfortable seat position across a wide range of users. The Aquia® IV Arc features Toto® Dynamax™ Tornado Flush®, utilizing a 360 deg cleaning power to reach every part of the bowl. This version of the Aquia® IV includes CEFIONTECT®, a layer of ceramic glaze that minimizes waste from sticking to ceramic surfaces. 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. Allows you to proactively conserve water by choosing between a 0.8 gpf rinse or 1 gpf 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.