Feature:1. The tachometer uses a stepping motor to drive the pointer, accurate motor RPM display and clear LCD display time.2. With high-precision 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 anti-fog 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 Percent 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-+70 Degree CStorage Temperature: -40-+85 Degree CWaterproof 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 SpeedsRegulation RatioPackage List:1 xTachometer 1 x Manual