LED light indicators show percentage of water in the brake fluid.
Turn on the brake fluid tester by pressing the button. A green light should light up. If the light does not come on, it may be time to change a battery.
Takes 1 x AAA/1.5V battery (included).
Easy to use - simply power up, dip probes into brake fluid and read results.
After testing, remember to screw the lid of the brake fluid reservoir back on tightly.
Package: Brake Fluid Tester * 1
Product Dimension: 5.9 * 1 * 0.8 inches