Faucet Features: 1) Intelligent control, infrared sensing device 2) Power supply modes: battery, AC power, AC battery standby 3) Equipped with solenoid valve, stop valve and filter device 4) Solenoid valve has obtained patent in China 5) Low energy consumption: four alkaline batteries can make the solenoid valve work 200,000 times continuously 6) Light flashing in the inductive window reminds user to change batteries