Sendida LED Shower Head Handheld Sprinkler Temperature Sensor 3 Color Changed Head Handheld in Bathroom This LED shower head no need batteries and external power supply, it will illuminate after water flows down, Hydro power illuminated by water pressure. You could SEE the water temperature instead of Feeling by the LED color changed. The sensitive shower head light will change colors according to the temperature of water. Cold water (temperature below 31C), LED light color will be Green; Warm water (temperature between 32~38C), LED light color turns Blue; Hot water (temperature between 39~45C), LED light color turns Red. Care and Love for the baby kid and children, the parents would use this item for kid's bathing care, and recommend the blue color temperature(you don't need a tester, you don't need to put you hand into the water and feel, and you don't need to ask your baby the water temperature is warm enough?), your baby will interest in the colorful water flow, you could adjust the temperature according the color. Transforming the stream of water into a beautiful waterfall of light. Colorful LED light can decorate your bathroom lovely and interesting. Romatic in bathroom even light off, a best gift to your lover, to your baby, children, new father/mother...... Best Quality Engineer ABS and great surface plating. Testing more than 10,000 times, all the LED fuctions are working well and no leakage.