Features Segmented Instructions: The segmented instructions indicate that the water content 0%-4% represents the water content and the water content in order to partition, so that the owners can quickly understand whether the water content of the brake fluids is qualified. Material: Made of high-precision metal material. Please wipe off the liquid on the probe with a dry cloth or paper towel after each test, which will help to detect the life of the pen. 5 LED Lights Display: 5 LED lights display the percentage of moisture content in brake fluids,how the test results more accurates Frosting Process: The appearance adopts frosting process, which is not easy to slip off. Compact and Portable Design: Designed for convenience, this compact and lightweight brake fluids tester fits perfectly in your toolbox or glove compartment, allowing you to easily carry it for on-the-go brake fluids testing. Notice: 1.Actual color may be slightly different from the image due to different and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Voltage: 12 (V) Operating temperature: 56 ( DegreeC) Size: As picture show Power supply: 1*AAA battery (not include) Package List: 1x Brake Fluids Tester