Speakman S-9122 Sensorflo Battery Powered Sensor Faucet with 8-Inch Deck Plate and Above Counter Mechanical Mixer Solenoid with built-in filter, 8-Inch deck plate, above counter mechanical mixer Batteries two (2) 3-volt lithium batteries and electronics housed above counter All brass body and spout Low battery warning light (10-Percent life remains) and 120-second time out feature Meets ASME A112.18.1/CSA B125.1