UNIVERSAL COMPATIBILITY: Designed for a wide range of gasoline engines, this 52mm (2-1/16inch) tachometer accommodates 2, 3, 4, 5, 6, and 8 cylinder configurations. Cylinder settings can be easily adjusted from the back of the gauge to match your engine. ADVANCED DESIGN: 270-degree dial sweep delivers precise readings, and the black faceplate, red needle, and bright white LED backlighting enhance visibility. The gauge features a stainless steel bezel with a convex clear lens and rugged plastic housing. MOUNT AND SIZE: The tachometer fits into a standard 2-1/16inch (52mm) dashboard opening and requires a 12-volt negative ground system DURABILITY: Built to withstand harsh conditions, this tachometer is waterproof and perfect for use on cars, boats, and yachts. FEATURES: Designed for performance as well , this tachometer enhances the functionality and appearance of your vehicle's dashboard. Its stylish design and reliable performance a must-have tool for monitoring engine speed Product Name: RPM Meter Product Application: Tachometer is suitable for any 2/3/4/5/6/8 cylinder gas engine Product Features: Universally applicable to most cars or motors Color: Black Material: plastic Package Contents: 1 x RPM meter 1 pack x installation parts 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.