Color: Silver + blue - Material: ABS - Finish: Chrome - Style: Contemporary - Temperature detectable for child and elderly safety - No batteries required - Transforming the stream of water into a beautiful waterfall of light. Brightness is such enough even no other lighting fixtures need - Thread Diameter: M24*1mm - Easy Installation - When water temperature at 0~32'C will emit green light automatically - When water temperature at 33~43'C will emit blue light automatically - When water temperature at above 51'C will emit red light automatically (Be careful to avoid scald)