UNIVERSAL COMPATIBILITY: Designed for a wide range of gasoline engines, this 52mm (2-1/16 inch) tachometer is compatible with 2, 3, 4, 5, 6, and 8 cylinder configurations. Cylinder settings can be adjusted from the back of the gauge to match engine specifications. ADVANCED DESIGN FEATURES: 270-degree dial sweep provides precise readings. Black faceplate, red needle, and bright white LED backlighting enhance visibility. Stainless steel bezel with convex clear lens and rugged plastic housing. MOUNT AND SIZE: Fits into a standard 2-1/16 inch (52mm) dashboard opening. Requires a 12-volt negative ground system. DURABILITY: Waterproof design built to withstand harsh conditions. Suitable for use in cars, boats, and yachts. PERFORMANCE: Enhances both functionality and appearance of your vehicle's dashboard. Stylish design and reliable performance for accurate engine speed monitoring. Product Name: RPM Meter Application: Compatible with 2, 3, 4, 5, 6, and 8 cylinder gasoline engines. Universally applicable to most vehicles and motors. Color: Black Material: Plastic Package Contents: 1 x Electrical Tachometer Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement may vary by +/- 1-3 cm.