⚡【Function】: The new pen brake fluid moisture tester can widely test the percentage of moisture in DOT3 DOT4 DOT5.1 ENV6 ENV4 brake fluid; results appear in seconds, quickly and easily. Faster, more accurate readings and a wider reading range than si, ⚡【LED Lights】: 5 LEDs indicate the percentage of water in the brake fluid in green, yellow and red colors. From low to high, green (0%) and yellow-green (4%) are in that order. Easily grasp the percentage of water in the brake fluid and consider whet, ⚡【Convenient】: The brake fluid tester tool is simple and convenient. It only takes a few seconds to check the quality of your car's brake fluid. It is easy to operate for many new car owners. It is also small and easy to carry, making it a must-have, ⚡【Quality】: This brake fluid test pen is the perfect tool that we updated after many studies of similar products on the market. It reads more accurately during the test. It is more resistant to corrosion and lasts longer compared to ABS material., ⚡【Operation】: Long press the top button to switch the brake fluid type, the initial default is DOT3, and the LED switches one brake fluid every 3 times from low to high. If you want to use one of the brake fluids when the LED is in the brake fluid ty
