The TOTO T20 washlet+ Carlyle® ii 1g one-piece elongated 1.0 GPF toilet and washlet S350E bidet seat is designed to conceal the washlet's power cord and water supply hose for a seamless installation. The washlet s350e 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 premise function sprays the bowl before each use to prevent waste buildup, keeping the bowl clean. The Toto washlet s350e includes an illuminated remote control with 5 spray settings, auto open and close lid, a heated seat, and instantaneous water heating. The skirted design of the Carlyle ii 1g conceals the trap way, enhancing the elegant look of the toilet for an additional level of sophistication. The Carlyle ii 1g features Toto's industry-leading 1g technology, offering a powerful flush with one gallon of water. The Carlyle ii 1g features Toto's tornado flush, a hole-free rim design with dual nozzles that creates a centrifugal washing action that assists in rinsing the bowl more. This version of the Carlyle ii 1g includes a layer of exceptionally smooth glaze that prevents particles from adhering to the ceramic. This feature, coupled with the washlet premise and tornado flush, assists to reduce the frequency of toilet cleanings. The Carlyle ii 1g is designed in Toto's universal height, allowing for a more comfortable seat position across a wide range of users. This washlet+ includes the washlet, Carlyle ii toilet, and unfit outlet for 12" rough-in. The Carlyle ii may be adapted for 10" or 14" rough-in with the purchase of a separately sold rough-in. Compatible with t20 washlet+ electronic bidet seat and toilet bowl components only. Additional items needed for installation must be purchased separately: wax ring, toilet mounting bolts, and toilet water supply lines.