Features1Aluminum Alloy: This waterproof digital tachometer is made of ABS and aluminum alloy material, which is durable and has a long service life. 2LED Display: The led screen of this speedometer has clear display, convenient viewing, simple operation, waterproof, and can be safely driven in rainy days. 3Applications: Suitable for gasoline engines. The tachometer can receive signals from the engine, ignition coil, crankshaft sensor or speed sensor, etc. 4GPS Function: With GPS function, this LED Display speedometer is the best choice for cycling modification enthusiasts. 5Wide Measurement Range: The speed measurement range is 0999KM/H, the maximum recorded driving distance is 099999KM/H, this tachometer has a wide range of applications.SpecificationItem Type: Waterproof Digital TachometerMaterial: ABS, aluminum alloyGross Weight: 144g / 5.1ozSpeed Measurement Range: 0-999KM/HMaximum Recorded Driving Distance: 0-99999KM/HPackage List1 x Counter1 x Line1 x Manual2 x Nut