Non-timely replacement of oil and deteriorated oil will reduce lubrication, reduce sealing effect, reduce cooling effect and reduce cleaning effect. At this time, an oil detection instrument is very important. Features: Mini portable, no need to take out oil, precise measurement, prolong the life of the car. One-button start detection, increased precision. LED display screen can accurately display the results, clearer readings. /> Use the optical principle to check the engine oil condition and get the latest status of your oil anytime and anywhere. With the optical probe, no need to take out the oil outdoors, simply place the probe into the oil dipstick to get the test results. Features: Material: ABS Color yellow Battery: 4 * AAA batteries (not included) Probe diameter: 5.3mm Required oil port: diameter6mm, bend 30 Hose length: 800mm Detection type: turbine Total height: 170mm Package size: 250 * 210 * 60mm / 9.8 * 8.3 * 2.4in Package weight: 405g / 0.9lb Note: 1. Do not test if engine temperature is above 60. Please check the thermometer on the dashboard. It should be below 60 to test. 2. Check that the probe is clean before testing and make sure that oil has flooded the probe during testing. 3. The new engine oil says 100.0%, the normal range is 30% to 100%. If the oil test result is less than 30.0%, the detector will alarm, indicating that you need to change the oil. Package List: 1 * engine oil tester 1 * brush