Two-Systems choice
1.Step on foot-plate for water supply and release to stop water supply. Safeguard of self-locking after 30 min of water flowing.
2.Step on foot-plate to turn on the water and step again to turn off the water. Safeguard of self-locking after 1 min of water flowing.
Easy installed in any existing faucet can be converted into Automatic Foot faucet.
The LED will twinkle when power is weak,replace battery. Self shut-off when power run out. 
 Battery life:2~3 years (based on 50,000 uses/year).
Water Pressure:0.5kgf/cm²-8kgf/cm²