Specifications:

Button lighting mode:

1. OFF: Off mode, the indicator light is red;

2. 1 files: some people turn on the strong light for 15-30 seconds, and then no one turns it off;

3. 2 files: Some people turn on the strong light for 15-30 seconds, and then the unmanned light is always on, which is very weak;

4. 3 files: Some people don't have it. The weak light is always on.