RGB 3-Mode LED Faucet Taps Filter Light Temperature Sensor Indicator (Battery-Free)
Temperature monitoring for child and elderly safety - No batteries required - Thread Diameter: 20mm - Easy Installation - Water temperature at 0~32'C will emit green light - Water temperature at 33~41'C will emit blue light - Water temperature at 42~45'C will emit red light - With flashing red LED light when water temperature above 42~45'C - Comes with 24mm & 20mm screw threads