Features: High Precision Safety Driving --- High quality probe privde high accuracy result, remind you do current maintenance and escort your driving. Universal Fit --- Universal Probe common fit for most vehicle using DOT4, DOT3, DOT5 brake fluids/liquid/oil. Easy Comfirm --- 3 Color LED Display display 5 Level Brake Fluid Status, easy and clear read under sun or night. Never limited by the enviroment. Instant Result --- Only takes seconds to know the results,test the car brake fluid quality quickly to check whether it's qualified, very easy to use. Scope of Application --- It's extremly convenient for personal use and broadly applied in individual workshops, repair factories and dealer workshops. Specification: Name: Brake Fluid Tester Material: ABS Voltage: 12V Color: Black Display : Three-color LED light display Battery : 2 * AAA Battery Test Range : DOT3DOT4DOT5 Be Applicable : All vehicles Using Temperature: -20-60 Item Size: 55 * 25 * 19mm 5 LED STATUS EXPLANATION Red: Brake oil with at least 4% water content Red: Brake oil with about 3% water content Yellow: Brake oil with about 2% water content Green/Yellow: Brake oil with less than 1% water content Green: Without water good condition LED Display Explanation: Green: The current test brake oil is in good condition. Green/ Yellow: Brake oil with less than 1% water content, Brake oil performance is good, you can use it with confidence. Green/Yellow/Yellow: Brake oil with about 2% water content, still able to work. Green/ Yellow/ Yellow/Red: Brake oil with about 3% , It is recommended to replace the brake fluid. Green/ Yellow/ Yellow/Red/Red: Brake oil with at least 4%, replaced immediately. Usage: 1. Turn on the brake fluid tester by pressing the button on top. A green light should light up. If the light does not come on, it may be time to change a battery 2. Unscrew the lid for the brake fluid reservoir, and take off the cap for the brake fluid tester 3. Dip the test probes into the brake fluid and the LED lights will indicate the percentage of water in the brake fluid 4. After testing, remember to screw the lid of the brake fluid reservoir back on tightly 5. The tester will automatically power off after 12 seconds of inactivity Packing List: 1 * Brake Fluid Tester Pen