Sensor operated concealed flush valve for urinal, 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. Flush Valve has optional pre-flush function. Sensor range and flush cycle time are manually adjustable on back of wall plate. Wall plate is satin-finish stainless steel. Front service acess for easy maintenance.