【Quick & Convenient】: The brake fluid moisture tester can widely test the percentage of moisture in DOT3, DOT4, DOT5.1 brake fluid. It can check the health status of your car brake fluid quickly, and remind you to change the brake fluid in time. It's extremly convenient for personal use and broadly applied in individual workshops, repair factories and dealer workshops.

【5 LED Lights】: This brake fluid tester comes with 5 LED indicators to show the percentage of moisture in the brake fluid. It will show percentage of water in the brake fluid with 3 colors, green, yellow and red. Red indicates the brake fluid needs immediate replacement. Green represents good condition, and yellow indicates the state is acceptable but soon require replacement.

【Easy to Use】: The brake fluid tester pen is easy to use with its intuitive design. Simply insert the metal probe into the brake fluid, after a few seconds, the corresponding LED light will light up and display the result. After the test is completed, the test pen will automatically close after 12 seconds.

【Premium Material】: This brake fluid tester is made of brass-plated metal, which is resistant to oil, oxidation and corrosion. The shell is black matte plastic, better anti-slip and good body texture. The change of conductivity can be used to determine the change of moisture in the brake fluid.

【Package Includes】: You will receive a brake fluid tester, which is suitable for determining brake fluid quality. It is compatible with AAA batteries, but please note that the battery is not included in the package. So you should prepare it by yourself. In order to save power and to prevent corrosion, please take out the battery after the test and clean the detector.