Traits: 2 inch 52mm tachometer gauge with super bright LED background light, gauge dial and needle pointer provide great visibility. The numbers and pointer clearly indicate the RPM. Blue light on the dial for easy reading in the dark. The measuring range is 0 to 8,000 rpm. Suitable for 4, 6 and 8 cylinders. High sensitivity and easy operation. Used to measure the RPM of the automotive engine. Note: It is suitable for gasoline engines, NOT diesel engines. Characteristics: Color: Black Material: Plastic Unit: RPM Measuring range: 0-8,000 rpm Power supply: 12 V DC, max. 0.3A Tachometer Size: 5.7 * 6.5cm / 2.2 * 2.6in (Max. Diameter * Height) Tachometer weight: 117 g / 4.1 oz Package Size: 17 * 12 * 7.8cm / 6.7 * 4.7 * 3.1in Package weight: 275 g / 9, ...