Operation: one touch of the bottom . Water flow, second touch. Water closed. The switch bottom is under the tap which can be wash , and self-clean by water flow. No electric operation Saving water: 48% water flow rate: 6l/min Size: 24*1 male thrad Materials: brass, chrome plating, pom, lead free Water pressure: 1-5kgf/cm2 Installation: Take off the original filter and o ring from the faucet , fix one touch tap on the faucet, then turn on the main switch withou touch it any more. Function: Hygiene, turn off the water by the bottom on the tap, without touching the switch to get the germs gre products World patent Lift span: 200, 000 cycle usage