This faucet light is our second generation item, it is much better than our first generation, such as you can change the battery easily. 

LED Qty: 4 Super Bright RGB LED
Casing mterial: Main body: PMMA with 
Stainless steel
Casing color: Argent
Size: Dia 40MM*55MM
Battery: 3*AG1625

Light System: 
A. If the water temperature is under 40 degree, the LED faucet light will emit blue light; 

B. If the water temperature is over 40 degree, the LED faucet light will emit red light. 

This faucet light is our second generation item, it is much better than our first generation, such as
1. You can change the batterry easily. 
2. It is more sensitive about the tempurature of water. 
3. Much better waterproof and quality.