1 X HK Water Glow LED Faucet Light Temperature Sensor grow 3 colors RC-F03 When water temperature is between 35C to 45C, it turns red color When water temperature is between 25C to 35C, it turns blue color When water temperature is less then 25C, it turns green color Item size: 56 mm in length, 28 mm in diameter Can be used more then 6000 hours