Speakman S-9129 Sensorflo Battery Powered Sensor Faucet with 8-Inch Deck Plate Above Counter Mechanical Mixer and Manual Override Solenoid with built-in filter, 8-Inch deck plate, above counter mechanical mixer and manual override 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