... A.Between 0~29°C , the LED faucet light will emit Green colour(or Blue colour);B.Between 30 ... ~39°C, the LED faucet light is Blue colour(or Green colour); C. Above 40 ... °C, the LED faucet light will emit Red colour Remarks: 1.Self powered by ... required. 2.When water flows down, the LED will light instantly and automatically 3.Main Market: USA, France, Russia ...