Feature:1. Effortless Installation: Cut an 52mm 2in hole in the panel and allow a clearance of 55mm behind the panel to fit the gauge. Put the gauge in the hole and screw down.2. Dynamic 7 Color Backlight: Personalize your dashboard with seven vibrant backlight colors, including Red, Green, Blue and other colors. Enjoy automatic color cycling, ensuring that your tachometer adds a stylish touch to any vehicle.3. Versatile Ratio Calibration: With an adjustable speed ratio from 1.0 to 360, this 2 inch tachometer accommodates various engine types. Whether for a car, truck, RV, or boat, achieve precise RPM readings every time.4. RPM and Hour Tracking: Track engine performance with the dual function 7000RPM Speedometer. It displays both RPM and hours, the hourmeter is non resettable. Suitable for derv engine and gasoline engine.5. Universal Fit: The 7000RPM tachometer gauge is tailored for multiple vehicles, including trucks, tractors, car, RV and boats. Count on it for accurate performance data and precise monitoring, enhancing your engine management capabilities.Specification:Item Type: 7000RPM TachometerVoltage: DC 9-32VSize: Approx. 52mm / 2inSeven Color Backlight: Sequence: Red (Default), Green, Blue, White, Yellow, Cyan, Purple, AutoAuto: Changes every minute, Loop through the above sequenceFitment: Suitable for Truck, Tractor, Car, RV, Boat.Package List:1 x Tachometer1 x User Manual