Hayatec Car Brake oil Tester Pen, Mini Automobile Diagnostic Detection Pen with 5 LED Indicator, Calibrated for Testing DOT3 DOT4 fluid, Water indicator

✅ Hayatec Simple Brake Fluid Tester Tool: Digital measuring provide quick and easy way to test the presence of water in the brake fluid, specially developed for car users & garage mechanics . ✅ Press the button for power on, green LED will light up. Insert the tester into reservoir for a second , then the results will be indicated correctly by LEDs. Auto power off . ✅Brake fluid detection pen is based on the change in conductivity to determine the moisture change brake fluid. It shows clearly the extent of moisture contained by the light-emitting diode, high moisture content will lead to lower boiling point, affect braking performance. Red indicates the brake fluid needs immediate replacement, green represents good condition, yellow indicates the state is acceptable but soon replaced. ✅ High Quality: The brake fluid tester pen’s probe is made of High-precision metal material, which offer a durable and accurate long use. After testing, remember to clean it with dry cloth or paper to keep. ✅Five LED indicators show the test results more accurate. Testing DOT 3, DOT4, DOT5 brake fluid