GM50H is one light and low price-orientated module used for demonstrating engine RPM,water/oil temperature, oil pressure, battery voltage and Hours. The users can adjust and set the parameters by the button on the front face in order to meet the different requests. Besides, it uses the European-style terminals for connection which is more convenient for installation and detachment.Various kinds of protections. Input frequency is available to check RPMVariety of sensor curves' parameters is set insideSensor curve can be self-defined by buttonsHigh-light digital tube can demonstrate the parameters. English and symbols demonstrationSpecification:Power:DC8-36VConsumption Power:MAX:1WSensor Resistance:0-1000OhmFrequency range of RPM Input signal:Freq 300Hz~15KHz]Amplitude range iof RPM input signal:AC3-65VInput Power signal:AC20-280V(45-70hZ)Input Frequency:Freq45-70HzInput Voltage:AC40-280VIngress protection:IP54Size:100 x 100 x 77mmInstallation Size:91 x 91mmcolor:BlackMaterial:plasticPackage Contents:5 x Engine Multi Function Digital MeterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.