Feature:1. The tachometer uses a stepping motor to drive the pointer, accurate motor RPM display and clear LCD display time.2. With highprecision instructions, repeatability and versatility, reliability and stability, training and control are relatively simple.3. The protection grade is IP67, the whole shell is completely waterproof, and has excellent antifog function.4. Suitable for automobiles, yachts, construction machinery, motorcycles, fit for various vehicle modifications.5. Made of high quality ABS shell, anti-corrosion and high strength for maximum durability.Specification:Conditon: 100% Brand NewItem Type: TachometerMaterial: ABSColor: As Pictures ShownSize: Approx. 52mm/2.0inEngine Speeds Range: 0-4000RPM, Range SelectableAccumulated Engine Hours: 0.0-9999.9HInput Parameter Tachometer Speeds Ratio Adjustable Range: 1.0-360.0Working Environment: Working Voltage: 9-32VDCWorking Current: <120mAWorking Temperature: -30-+70Storage Temperature: -40-+85Waterproof Rating: IP67Application: Suitable for automobiles, yachts, construction machinery, motorcyclesWiring Method:1. Black Wire: Negative Pole of Power Supply (-)2. Red Line: 9-32VDC3. Blue Line: RPM Signal4. Yellow Line: Backlight5. White Line: White Line to Negative Speeds Regulation Ratio.Package List:1 x Tachometer1 x Manual