Speakman S-8729 Sensorflo Battery Powered Sensor Faucet with 8 In. Deck Plate, Above Counter Mechanical Mixer & Manual Override Solenoid with built-in filter, 8" deck plate, above counter mechanical mixer and manual override Batteries two (2) 3-volt lithium batteries & electronics housed above counter All metal chassis & removable cover Low battery warning light (10% life remains) & 60-second time out feature Meets ASME A112.18.1/CSA B125.1