Description For all vehicles. The compact design and internal batteries allow these instruments to be used to measure engine parameters on various vehicles. If you prefer, by connecting the power supply directly to the vehicle, you can use the instrument exclusively on that vehicle. This is a single, compact instrument that allows you to monitor three fundamental parameters: Engine RPM Coolant temperature Actual engine usage hours With the RPM function, you can record both maximum RPM and instantaneous engine RPM. The TEMP function displays the coolant temperature. The HOUR function is a counter that keeps track of the actual operating hours of the engine to help you determine when to perform maintenance. Display range: 0 ~ 15,000 Rpm Display unit: 10 rpm Display range: -25°C ~ 250°C (-13°F ~ 482°F) Display: 0.1°C (°F) Backlight: Blue Temperature warning The display will flash when the temperature is higher than or equal to the prescribed value. Total Time Instrument Display Range: 0 ~ 99999 Hours Display Unit: 1 Hour A / B Time Instrument Display Range: 0.0 ~ 999.9 Hours Display Unit: 0.1 Hours Actual Voltage: DC 12V Battery Type: CR 2032 Time Battery life: 350 hours Effective usage temperature range: -10 ° C ~ +60 ° C Instrument dimensions: 69 x 32 x 16 Instrument weight: 48g The instrument is resistant to a few drops of water, but is not waterproof (it is therefore not recommended to place it under direct jets of water).