No Battery and electronic connection needed. There is a micromoto inside the faucet and it can supply power to the led light forever with the water flow supply power to itself.
How to work:Feature:
Worked water pressure: 0.50-2.11 GPM
Water flow automatically changes the color with the temperature changed. LED turns blue when under 25°C, turns green when between 25°C - 38°C, turns red when when higher than 38°C.
This led faucet made by solid brass body with chrome plated.
Ceramic cartridge and zinc alloy handle.
Work for long time