No battery is needed
When water flows down, the LED will light instantly and automatically
Brightness is such enough even no other lighting fixtures need. The LED color will change gradually and automatically
The change of LED color will be subject to the temperature of water.
When water temperature is between 33-41centigrade,Blue color will show automatically
When water temperature is between 42-45centigrade,Red color will flash immediately
When water temperature is between 46centigrade,Red color will flash immediately

Features:
LED quantity: 8PCS 
LED LED Color: Green / blue / red (Color temperature shift) 

Case Material: ABS
Shell Color: Metallic
Surface Treatment: electroplating

Package Include:
1 x Changing bathroom Rain Fall Shower Head