Function: 1. More sensitive than general instruments that can accurately display data. 2. The lighting on the dial makes it easy to read in the dark and provides great convenience. 3. The instrument with 7 colors can adapt to the needs of more environments, and switching colors with buttons is very convenient. 4. It can add the appearance of racing car to driving, with high quality and light weight. 5. After excellent craftsmanship and professional processing, this car tachometer has good performance and can meet your needs well. Specification: Item Type: Car Tachometer Material: ABS Unit: Rotation per minute Display Range: 0-11000 RPM /min Dial Dimater: approx. mm / 3.15in Akcesoria: suitable for most 1-8 (1,2,3,4,5,6,7,8) cylinders of 12V petrol vehicles Power Supply: DC(10-15V) 12V Professional How to use: Wiring: Red wiring – positive Black wiring – minus Red White Light Source Wiring Line Green wiring signal line Yellow Wiring Signal Line List of packages: 1 x Car Tachometer 1 x Alarm Light 1 x Seal 2 x Double Sided Tape 1 x Rubber Pad 1 x Manual 2 x Screw 2 x Meter Cover 2 x Bracket 1 x Shift button 1 x Power Cord