The light circle of the light-emitting diode indicates the color of blue, green or red light according to the corresponding water temperature range (0 ~ 29 : blue; 30 ~ 41 : green; > 41 : red); People can relieve pressure and eliminate fatigue by color conversion. The led shower head automatically changes the light colors and more colors are displayed. With the digital temperature display, it is possible to have real-time control of the water temperature. No batteries, color bathroom shower hand shower no wire required: The color changing LED are powered by running water, no batteries needed. A great home bathroom shower head sprayer replacement, easy to install, simple and practical.< /p> Product Description Product Features: Specification: Condition: 100% brand new Material: ABS + TPR White color Male thread: G1/2 LED power supply: hydroelectric generation (no additional battery needed) Light color: blue (0~29); Green (30~41); Red (>41) Size (H x W): approx. 24 x 12.5 cm / 9.45 x 4.92 inch Weight: approx. 210g Packed Included: 1 x 3 Color Temperature Control LED Shower Head