The color's change remind you the water's temperature:Water glows Green when water is Cold (temperature below 32°C).Water glows Blue when water is Warm (temperature is 33°C - 41°C).Water glows Red when water is Hot (temperature is 42°C - 45°C).When the water temperature exceeds 46°C,red flashing warning,be careful to avoid being scalded!
Rely on hydraulic drive generating their own power, No need for the power supply, safe and environmental.
Swivel ball joint adjustable to suit your need.Easy Installation.