Features: 1.Universal Type: 2?in?1 voltmeter and water temperature meter is suitable for automobiles, RVs, ships, yachts, motorcycles. 2.Advantage: Intuitive display parameters, high accuracy, low power consumption, good stability, strong anti shake ability. 3.Advanced Technology: Adopting advanced single chip technology, the safety parameters of the car engine are directly displayed on the LCD screen. 4.Good Measuring Device: With wide range of applications, long service life and comprehensive protection functions, ideal choice for measuring the performance of various motors. 5.Quality Material: Car voltage gauge is made of premium ABS and brass material, rustproof, sturdy and durable, long service life. Specification: Item Type: Water Temperature Meter Material: ABS and Brass Working Voltage: DC9-36V Working Environment Temperature: -40-50 Working Environment Humidity: 45%-75%RH Test Parameters and Alarm Points: Voltage Test Range: 9-39V Measurement Accuracy: 0.1% Alarm Voltage: Lower Than 10V, 16-20V, Higher Than 31V Intermittent Alarm Water Temperature Measurement Range: -10-120 Measurement Accuracy: 0.1% Intermittent Alarm Above 95 Fitment: Universal for Cars, RVs, Ships, Yachts, Motorcycles