Features:No Battery Needed: The product has mini built-in generating electricity devices, no need of batteries, as long as the water flow it will give out light, turn off the water, the light goes out immediately.360 Rotation: Water flow can easily cover the whole sink, 360 degree rotatable, practical faucet nozzle, cold winter will not worry about clean the sink and trouble.Temperature Control 3 Colors Changing: Type A is temperature control 3 color changing, change color with temperature change. The color is blue when the water temperature is below or equal to 31C , green when it is between 32C and 43C, and red when it is between 44 C and 50CMulticolor Self Discoloration: Type B 7 light color self changing, is a single or multicolor display that changes colors quickly and continuously, showing the colorful seven colors of the rainbow, regardless of the water temperatureWide Application: With the size of 57 x 30mm/2.24 x 1.18inch(L x Out dia), make the product suitable for a variety of faucet interfaces, proper for bathroom or kitchen, very fantastic and durableSpecificationTypes: A(temperature control 3 color changing), B(7 light color self changing)Material: ABSColor: SilverSize(L x Out dia): About 57 x 30mm/2.24 x 1.18inchSurface treatment: ElectroplatingPackage included:1pc x Faucet NozzleNote:Due to the light and screen difference, the item& 039;s color may be slightly different from the pictures.Please allow 0.5-2cm differences due to manual measurement.