Features: High precision driving safety --- High quality probe provides high precision result, reminds you to do routine maintenance and escorts your driving. Universal Fit --- Universal probe in common fit for most vehicle using DOT4, DOT3, DOT5 brake fluids/fluid/oil. Easy CONFIR --- 3 LED Color Screen Display 5 Level Brake Smooth Status, easy and clear reading under the sun or at night. Never limited by the environment. Instant result --- only takes a few seconds to know the results, test the quality of car brake fluid quickly to check if it is qualified, very easy to use. Scope of Application --- It is very beneficial for personal use and widely applied in individual workshops, factories and dealer repair shops. Specification: Name: Brake Fluid Tester Material: ABS Voltage: 12V Black color Display: three color LED screen Battery: 2 AAA batteries * Test Range: DOT3, DOT4, DOT5 Be applicable: All vehicles Operating temperature: -20-60 Item Size: 55*25*19mm 5 STATE LED EXPLANATION Red: brake oil with at least 4% water content Red: brake oil with about 3% water content Yellow: Brake oil with approximately 2% water content Green / Yellow: Brake oil with less than 1% water content Green: Without water good condition LED display Explanation: Green: Current test brake oil is in good condition. Green yellow: Brake oil with less than 1% water content, the performance of brake oil 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. Use: 1. Turn on the brake fluid tester by pressing the button on the top. A green light should come on. If the light doesn't come on, it may be time to change a battery 2. Unscrew the cover for the brake fluid reservoir, and remove the cap from the brake fluid tester 3. Immerse the test probes in the brake fluid and the LED lights indicate the percentage of water in the brake fluid 4. After testing, remember to screw the rear brake fluid reservoir cover tightly 5. The tester powers on automatically after 12 seconds of inactivity Packing List: 1 * Brake Fluid Tester Pen