Description For all vehicles. The compact design and the presence of internal batteries allow these tools to be used to measure engine parameters on different vehicles. If you prefer, by connecting the power supply directly to the vehicle, it is possible to use the instrument exclusively on that vehicle. It is a single and compact instrument that allows the control of three fundamental parameters: Engine RPM Coolant temperature Hours of actual engine use With the function RPM it is possible to record both maximum RPM and instantaneous engine RPM. The TEMP function displays the temperature of the coolant. The HOUR function is a counter that keeps track of the actual operating hours of the engine for the correct determination of the appropriate time to carry out the necessary maintenance. Display range: 0 ~ 15,000 Rpm Display unit: 10 rpm Display: -25°C ~ 250°C (-13°F ~ 482°F) Display: 0.1°C (°F) Backlight: Blue color Temperature warning The display will flash when the temperature is higher than or equal to to the prescribed value. Total hour instrument Display range: 0 ~ 99999 hours Display unit: 1 hour Time instrument a / b Display range: 0.0 ~ 999.9 Hours Display unit: 0.1 hours Actual voltage: dc 12v Battery type: cr 2032 Battery life time: 350 hours Effective usage temperature range: -10 ° c ~ +60 ° c Instrument dimensions: 69 x 32 x 16 Instrument weight: 48g The instrumentation is resistant to a few drops of water, but is not waterproof (we therefore advise against placing it under a direct jet of water).