Brake Fluid Liquid Tester Pen with 5 LED Indicators, Calibrated For DOT3 DOT4 Brake Fluid

Brake fluid test type: dot3 brake fluid test pen can also be used to test liquids of DOT4, DOT5.1, ENV6, and ENV4. Compatible with most automotive brake fluids., Convenient Tool: This brake fluid testing pen is very compact and is used to test the moisture content of automotive brake fluid. Press the button on the top and immerse the probe into the brake fluid being tested for its water content., Easy to read: You can get the results in a few seconds. By using the percentage reading next to the LED light on the brake fluid test pen, you can simply read the results of the water content in the brake fluid., PREMIUM QUALITY: This pen brake fluid tester is made of premium nylon raw material more durable to use. （1 AAA battery needed for use, not included in the Pack), Note: If the green LED light does not turn on after pressing the power button for a long time, the power supply needs to be replaced. Please clean the test probe with water after each use of the test pen.