LED Backlight Motorcycle Meter Tachometer Gauge Rev Counter 0-13000 RPM chrome the tachometer is electric . Material: Stainless Steel Tachometer unit: RPM.Fits for motorcycle (4 stroke). Fits for most of motorcycles, eg: street motor. Wire connection: long Red light +,long Black light -,Short Black power/ignition lock +,Short Green Ground,Short Yellow engine signal line