ND Brake Fluid Testers, Auto Brake Fluid Liquid Testing Pen for DOT3 DOT4 Vehicle, Automotive Brake Fluid Moisture Tester Testing Tools with 5 LED Indicators

Auto Brake Fluid Tester: Check the health status of your car brake fluid quickly, and remind you to change the brake fluid in time to make you more comfortable to drive.
Simple Design and Durable: 5 LED indicators show the percentage of water in the brake fluid. The brake fluid tester pen is compact and portable, made of nylon material, which can resist corrosion, very durable.
Easy Operation: Install the LR03 AAA 1.5V battery(not included), press the button at the top, dip the probe into the brake fluid, and the test result will be indicated by LEDs in a few seconds. The brake fluid tester pen will automatically power off after about 15 seconds of inactivity.
Extensive Application: Support most of the vehicle with DOT3 DOT4 car brake fluid. This brake fluid tester is developed for both professional and amateur, widely applied in individual, repair factories and dealer workshops.
TIPS: If the green LED no longer lights up after pressing the button, replace the battery. After each use, clean the test probe with tap water.