Product Introduce: The brake fluids tester is suitable for determining brake fluids quality. Brake Fluids Tester is according to the variation of electrical conductivity to determine the moisture content of the brake fluids change.It through the light-emitting diodes clearly shows the degree of moisture. High content moisture will reducing the boiling point, and then affect the braking performance. Red indicates brake fluids need to be replaced immediately, green indicates brake fluids in good condition, yellow indicates brake fluids stays good, but is going to change. Designed without cable connector Fast and convevient Features: 1. This digital brake fluids tester is developed for professional use in automotive repair shops and in servicing. 2. Check the brake fluids quality of your car in seconds The Premium LED Brake Fluids Tester is a must-have tool in every car 3. Safe and Convenient. Provides more security. It helps check the health status of DOT3, DOT4, DOT5 car brake fluids to ensure your safety when driving. 4. Easy to Use. Check the quality of your car39;s brake fluids for only seconds. It39;s easy to operate that even a beginner will know how to use. Just place the tester in the reservoir for one seconds and the LED will display the result correctly. 5. 5-LED Indicator. The LED indicates the percentage of water in the brake fluids with three colors: green, yellow and red. You can use it even in the dark as it makes reading data easier. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. 2. After every testing,you need clean the tests head with dry cloth or paper. 3. Due to the cause of international air transport, we will not provide the battery. Specification: Product size: 19*12*7cm Power supply: 1.5V AAA x 1not included Suitable for DOT3 / DOT4 testing Directions for using: 5 LEDs indicating the water in the brake fluids : 0 LED:there is on water content in brake fluids 1 LED: Water Content, H2O1, brake fluids is above standard 2 LED: Water Content, H2O2, still can use it 3 LED: Water Content Water Content, H2O3, brake fluids should be changed 4 LED: Water Content Water Content, H2O4, brake fluids must be changed Indicator Light: Green: The battery is OK. There is no water in the brake fluids. Green/Yellow: The water content of the brake fluids is less than 1. The brake fluids has good performance and can be used with confidence. Green/Yellow/Yellow: The water content of the brake fluids is about 2. The brake fluids can still be used continuously. Green/Yellow/Yellow/Red: The water content in the brake fluids is about 3. It is now recommended to replace the brake fluids. Green/Yellow/Yellow/Red/Red: The water content of the brake fluids is at least 4 only. The brake fluids needs to be replaced immediately Reminder: After each test, don39;t forget to wipe the liquid part of the tests point with a dry cloth or paper. Package List: 1 x Brake Liquid Tester