Brief introduction：
1). High and cold temperature resistance;
2). It will light blue in cool water & light red in hot water;
3). Works with 2pcs built-in button batteries (included, changeable);
4). 2 sizes of tap adapters included, fits for most of taps. Specialized screw designs are welcome;
5). Low and safe voltage. CE or UL certificates not needed;
6). Instructions:
Just attach it to the outlet of your faucet, when water flows through the magic chamber, it simply turns on the LED array and illuminates the stream with soft color.