1Made of high quality material, high precision and durable in use. 2Comes with calibration function, detection accuracy is higher. 3Detection of diesel engine oil, gasoline engine oil, by testing the oil acid, carbon deposition and moisture, other impurities. 4With ten lights to accurately mark the quality of the oil. 5Compact size, easy to carry.Features: Made of high quality material, high precision and durable in use. Comes with calibration function, detection accuracy is higher. Detection of diesel engine oil, gasoline engine oil, by testing the oil acid, carbon deposition and moisture, other impurities. With ten lights to accurately mark the quality of the oil. Compact size, easy to carry.Specification: Material: Plastic Weight: 74g/2.6oz Color: Red Power Supply: 2 x 3V CR2032 button battery (Not included) Size: Approx. 8.3 x 5.3 x 1.3cm/3.3 x 2.1 x 0.5inch Type: Oil detector Relative Humidity: 80% Instructions: -Select engine type GAS or DSL (diesel). -Slide power switch ON. -Place oil on sensor to fill line. -Press OIL TEST button. -Observe oil quality indicator lights. Package List: 1 x Engine Oil Quality Detectorwith Strap