The TOTO T20/T40 WASHLET plus and Auto Flush Ready S7A Elongated Bidet Toilet Seat with EWATER plus and Auto Open and Close Classic Lid is an electronic luxury seat that cleanses you with warm water, providing an exceptionally clean feeling. Instead of traditional toilet paper that can sometimes be rough and often ineffective, the WASHLET quickly provides comfortable warm water cleansing at the touch of a button. The TOTO T20/T40 WASHLET plus Ready WASHLET S7A can be installed on standard elongated toilets or on TOTO T20/T40 Toilets which conceal the WASHLET bidet seat