【Quality Materials】: Its probe is made of brass-plated metal, which is highly resistant to corrosion and oil. In addition, the plastic casing is abrasion and scratch resistant and the body has a good texture. Both will not break easily and can better meet your needs for long-term use.

【Lighting Indicator】: It shows its moisture percentage in green, yellow and red color respectively. The green color indicates good condition. Yellow indicates acceptable condition but needs to be changed soon. The red color indicates that the brake fluid needs to be changed immediately.

【Precision Testing】: This brake fluid test pen can accurately detect the health of your car's brake fluid. After using this product, you will be able to know the specific condition of brake fluid in time, and take timely countermeasures, which can well improve driving safety.

【Operating Method】: You need to immerse the test probe into the brake fluid in the reservoir, then turn on the power and hold it for 1 second. The test result will be indicated by the lighting of the LED and the test pen will turn off automatically after 12 seconds after the test is completed.

【Scope of Application】: Our brake fluid test pen is suitable for DOT3, DOT4, DOT5.1 brake fluid moisture percentage testing. In addition, it a requires AAA batteries to work. But please note that the battery is not included in the package, so you need to buy it separately.