Features: Mini portable, no need to take outside the oil, accurate measurement, extend the life of the car. One-button boot detection, higher accuracy. LED display screen can accurately display the results, clearer readings. Use the optical principle to check the oil condition of the engine, and get the latest status of your oil anytime and anywhere. With optical probe, no need to take the oil outside, just put the probe into the oil to get the test results. Specifications: Battery: 4 x AAA battery (not included) Oil hole requirement: diameter 6mm, curvature Less than 30 Detection type: turbineoil Note: 1. Please do not test if the engine temperature is above 60. Please check the thermometer on the instrument panel. It must be 60 to test. 2. Check that the probe is clean before testing, and that the oil has flooded the probe during the test. 3. The new engine oil shows 100.0%, the normal range is 30%~100%. If the oil test result is less than 30.0%, the detector will sound an alarm, indicating that you should change the oil. Material: plastic colour: yellow Package Contents: 1 x Engine Oil Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.