Sensor operated concealed flush valve for water closet, equipped with solenoid and sensor unit, with wall cover plate for electrical gang box, with angle stop and strainer. Powered by a 6V Hybrid power supply (AC&DC), flush valve will automatically switch to battery power in the event of power failure. Override flush button on wall plate is available for manual second flush cycle time are manually adjustable on back of wall plate. Wall plate is satin-finish stainless steel. Front service acess for easy maintenance.