1. Eco-friendly, Hydroelectrical power, no battery or wire needed.
2. Advanced plastic material with best plating on surface.
3. Brass connection on the back
4. Safe with Nice feelings in showing:

When the water flow through, the light will be turned on atomatically, color changed with the water temperature:

(1) Temperature below 26 will be blue;
(2) Temperature between 27and 36will be warm white light;
(3) Temperature between 37and 40 will be red light;
(4) Temperature above 40 will be flickering red light