The innovative design of the Swash Ecoseat 100 bidet toilet seat provides a more refreshing and hygienic bathroom experience, without electricity or batteries. Powered solely by water pressure, the Ecoseat features aerated posterior and feminine washes, a sterilizing water filter, self-cleaning nozzles, and convenient ergonomic controls. It's so nice (and easy!) to be clean and green. PLEASE NOTE:Toilet seats, washlets and bidets are NOT RETURNABLE.