Equipped with Surround Sensor[TM] Technology, Auto Faucet[R] delivers water only when needed, resulting in water savings of up to 70%. Kit 1 Contains: Spout and valve control module. Kit 2 Contains: Spout, valve control module and main supply hose (1/2" pipe x 3/8" comp x 12" length). Kit 3 Contains: Spout, valve control module, mixing valve and hot/cold supply hoses (3/8" com x 3/8" comp x 12" length). Kit 4 Contains: Spout, valve control module, thermostatic mixing valve and hot/cold supply hoses (3/8" com x 3/8" comp x 12" length).