- Test dot 3 & 4 brake fluid (dot 5 for ref. only)
- 5 LED to indicate percent of water in the brake fluid.
- Batteries: 1x 1.5V AAA
- Immerse tester probe into brake fluid, press the button and for about 2 seconds the test result is indicated on the lightest diodes.
- Green: Battery OK
- Green/Yellow: Water content＜1%
- Green/Yellow/Yellow: Water content ≈2%
- Green/Yellow/Yellow/Red: Water content ≈3%, change brake fluid
- Green/Yellow/Yellow/Red/Red: Water content ≥ 4%,change brake fluid urgently