Hign-concerned Chemical:NoneOrigin:Mainland China High Precision :The brake fluid tester has a high precision that ensures accurate readings every time. Portable Use :This tester is portable, making it easy to use anywhere, anytime. Safety Quality Assurance :The brake oil detector test pen ensures safety and quality assurance for your vehicle's brake system. OBD2 Brake Oil Detector Test Pen :The OBD2 brake oil detector test pen is a powerful tool that can diagnose and fix brake issues quickly. High Precision :The brake fluid tester has a high precision that ensures accurate results, making it easy to diagnose any issues with your brake system. Portable Use :This test pen is portable, making it easy to use on-the-go, without the need for any special equipment or tools. Safety Quality Assurance :The brake oil detector test pen is designed to ensure safety and quality, ensuring that your brake system is in good working order. Product description The brake fluid testing pen is used to test the quality of the brake fluid. The test result of the water content percentage of the brake fluid is displayed by the number of 5 LED lights on the test pen. The FT123 brake fluid testing pen measures the moisture content of the brake fluid based on the change in electrical conductivity, and clearly displays the moisture content through the light-emitting diode. High moisture content will lead to a decrease in the boiling point and affect the braking performance. A red light indicates that the brake fluid needs to be replaced, a green light indicates that the brake fluid is in good condition, and a yellow light indicates that the condition is acceptable. Features Powerful function, simple operation; accurate measurement, safe use; Detect all brake fluid; with automatic shutdown function; Can test DOT3/4/5 brake fluid. Product Instructions Green: power OK/no water; Green/yellow: moisture content is less than 1%; Green/yellow/yellow: water content close to 2%; Green/yellow/yellow/red: the water content is close to 3%, it is recommended to replace the brake fluid; Green/Yellow/Yellow/Red/Red: The water content is higher than 4%, dangerous, and the brake fluid must be replaced immediately. Note: 1 .AAA battery, open the battery cover according to the direction indicated by the arrow on the test pen. 2.If the green LED light does not light up after pressing the power button for a long time, you need to replace the battery; 3. After each use of the test pen, please wash the test probe with clean water; 4. Please do not expose the brake fluid to the air for a long time, because the brake fluid has strong water absorption. Preparation before the test Unscrew the cap of the brake fluid reservoir and remove the cap of the test pen. Dip the test probe into the brake fluid in the reservoir. Moisture Test Press the power button, the green LED light will light up. Hold for 1 second, the test result will be displayed by the lighting of the LED light, after the test is completed, the test pen will automatically turn off after 12 seconds. Packing List: 1 x FT123 Brake Fluid Test Pen (AAA batteries not included) Notice: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement.