FeaturesSegmented 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 fluidsis 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 accuratesFrosting 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 fluidstester fits perfectly in your toolbox or glove compartment, allowing you to easily carry it for on-the-go brake fluidstesting.Notice:1.Actual color may be slightly different from the image due to different and light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Voltage: 12 (V)Operating temperature: 56 ()Size: As picture showPower supply: 1*AAA battery (not include)