Features: 1.Wide Application: 52mm tachometer is widely applicable to 4 6 8 cylinder gasoline vehicles, with installation instructions for easy installation. 2.High Sensitivity: 0?8000RPM high precision tachometer can get signal from engine, ignition coil, crankshaft sensor, or tacho sensor. 3.Clear Display: The tachometer uses blue LED backlight and color retrieval technology. (When the vehicle is turned off, the indicator light returns to its previous color.) 4.Weatherproof: Waterproof, dustproof and fogproof, no need to worry about possible damage caused by bad weather. 5.Shock Resistant: Comes with hoses and screws for optimal and secure connection. The tachometer works even with strong vibrations. Specification: Item Type: Tachometer Material: ABS Size: Approx. 2in/52mm Installation Method: Yellow to light switch 12V(+) Black to battery (-) Green to sensor green White to ignition switch 12V(+) Red to battery (+) Fitment: For 4/6/8 Cylinders Gasoline Models PackageList: 1 x Tachometer 1 x Hose 2 x Screw 1 x Manual