Wogomz Brake Fluid Liquid Tester Pen, DOT 3 DOT 4 DOT 5.1 Brake Fluid Liquid Tester with 5 LED Indicators, Car Diagnostic Testing Tool, Universal Fluid Liquid Oil Analyzer

【Practical & Widely Useful】: If car brake fluid is too watery, it will lead to lower boiling point, lower braking force, longer braking distance and affected brake function. This test pen can quickly check the water content and remind you to change the brake fluid in time. It is widely used to test DOT3, DOT4 and DOT5.1 brake fluid.

【5 LED Lights】: This brake fluid tester is equipped with 5 LEDs with 3 colors to show the percentage of water in the brake fluid. Green means good condition, yellow means acceptable condition but needs to be changed soon, and red means the brake fluid needs to be changed immediately.

【Easy to Use】: This product shows results quickly and is very intuitive. All you need to do is to insert the metal probe into the brake fluid and after a few seconds, the corresponding LED will light up and display the result. When the test is complete, the test pen will automatically turn off after 12 seconds.

【Reliable Material】: The brake fluid tester is made of brass-plated metal with good electrical conductivity. It is water, oil and corrosion resistant and very durable for long time use. The case is black matte plastic, which feels good and non-slip, making it easier to grip when using.

【What You Get】: You will receive a brake fluid tester. It is compatible with AAA battery, but please note that battery are not included in the package, so you should prepare them yourself. After the test, please clean the metal probe with water, and to save power, remove the battery.