bathroom faucet, automatic tap, shower room Model No.:FW-1311 Power and Voltage: CR123A Lithium Battery , D/C 3V Diameter of Water Pipe: G1/2" Water Pressure: 0.05-0.9MPa Power Consumption in Static: ≤0.5mW Detection Zone: 10-25cm (based on standard inductive board) Temperature: 0.1°C--60°C Material: Copper Chromeplate 80cycles/day, doesn't need to change battery within 3 years.