Features:4-in-1 car instrument, integrating oil preure , water temperature , and , With LCD dial display, clear and easy to viewIt can work under ul-wide voltage, 40V can also work normally. When the voltage is too high or too low, it will f and alarm.It has the function of anti-shake of oil level, and it can keep normal display even if the car isped or the oil float is opened.With the quisetting function of the r, it is convenient and quito choose the existing vehicle models.With s-learning function, it can fit the oil float resistance value of any model.9-36V working voltage, suitable for most models on the market, such as cars, trucks, RVs, SUVs, etc.Specifications:Color: BlackMaterial: PlasticsWorking Voltage: 9-36VWorking Temperature: -40 - 50℃Working Humidity: 45%-75%RHVoltage Test Range: 9-39V, Accuracy: ±0.1%Water Temperature Measurement Range: -10-120℃, Accuracy: ±0.1%Oil Test Range: 0-1.0MP, Accuracy: ±0.1%Oil Resistance Range: 5-1000Ω, Accuracy: ±1%Item Size: 96 * 63 * 31mm/ 3.8 * 2.5 * 1.2inPackage Size: 123 * 93 * 52mm/ 4.8 * 3.7 * 2.0inPackage Weight: 284g/ 10.0ozPacking List:1 * Car Instrument2 * Screw