General description Universal 3.75' 12V White LED Backlit Tachometer Gauge with Red Shift Light is designed for use in gasoline vehicles. It is compatible with 4, 6, and 8 cylinder engines, providing accurate RPM readings from 0 to 8000 RPM. Technical specifications Measuring range: 0 ~ 8000 RPM Power: 12V DC Backlight: White LED Shift Light: Red Color: Black Material: ABS Size: 3.75 inch Measurement allowed error: +/- 1-3 cm Package contents 2 x Tachometer Gauge 2 x Installation Kits 2 x User Manual