Features: 
No batteries and external power supply, it will illuminate after water flows down. 
Automatic light switching. 
7 colors are displayed automatically when water flow. 
Main colors are Green, Red & Blue. 
ABS material, excellent corrosion resistance, durable. 
Transforming the stream of water into a beautiful waterfall of light. 
Fits all standard connectors, easy to install. 
Offer you a delight bath & a wonderful experience. 
Ideal for bathroom to make it more fantastic. 
Get the CE & RoHS certificates 
There are four types for your chosen. 

1)single color means LED faucet aerator light in one color once there is water flowing through the shower head, single green, single blue, single red,single white, single orange and so on for your chosen. 
2)7 colors means LED faucet aerator light in different colors at the same time once there is water flowing through led faucet light 
 7 colors fast flashing---LED Hand shower head lights and flash as disco; 
 7 colors gradually flashing---LED Hand Shower Head lights changes from one color to another color slowly and there are 7 colors in all. 
 Color changes according to time instead of water temperature. 
3)Temperature detective means LED shower head light in RGB according to different water temperature. 
 When the water temperature is less than 32 degree, the LED shower head will light green or blue . 
 When the water temperature is between 33 degree and 41 degree, the LED shower head will light blue or green 
 When the water temperature is between 42 degree and 50degree, the LED shower head will light red 
 When the water temperature is over 50 degree, the LED shower head will flash red to warn.