Water pressure: 1.5L – 2.0L per minLong life: 4xAA Alkaline batteries can be used for 2 years based on 200 cycles every day.Power supply: DC6V (4 x AA alkaline batteries).Low-power indication: Indicator light flashing every 2 second when power is under 80% of rated voltage.Power-off protection: Magnetic valve can be shut off as the voltage reduction.Dual Mode: Faucet will work on first AC Mode, when there is no electrical supply it will automatically shift to batter DC Mode (Use only DURACELL Batteries)Self-Close For Abnormal Power: When power supply (AC Mode) is cut off suddenly or battery DC mode is power out, it will self – close. Operation : Infra-Red Sensor Water Output : 1.5 L – 2.0 L per minute, Intelligent Technology Sensing Range : 10 – 20 cm Battery Operated : 4 x AA Duracell, Equipped for Green Building