ZKTOOL New Upgraded Version Brake Fluid Tester Pen, Test DOT3 DOT4 DOT5.1 ENV6 ENV4 Brake fluids,Brake Fluid Moisture Analyzer with 5 LED Indicators,Brake Fluid Liquid Tester Pen

For your safety, you need to know whether the vehicle is in its best condition. Why you need a brake fluid detector: When moisture penetrates into the brake system through the brake hoses and seals, the brake fluid will be contaminated, and the risk of brake failure will increase. It may endanger your safety. The brake fluid should be checked regularly, and the brake fluid should be replaced every one to two years. The pen-shaped brake fluid tester can easily and quickly help you determine whether you need to replace the brake fluid. Choose this: It can test five different types of brake fluid DOT3 DOT4 DOT5.1 ENV6 ENV4, Operation: 1. Press the top button, the green indicator light is on, and you can insert the brake tester. 2. Confirm the type of brake fluid, press and hold the top button, the indicator light flashes 3 times from low to high.Change a gear (default DOT3), if you want to use one of the brake fluids, Please release the button when it flashes twice. 3 Green: 0%, green/yellow: less than 1%, green/yellow/yellow: about 1% -2%, green/yellow/yellow/red: 2%-3% (Time to replace the brake fluid.) Green/Yellow/Yellow/Red/Red: >4%(Must be replaced) 5. After determining the percentage, please clean the plug with tap water, lea