Adjust the backlight brightness: Short press the small button. Adjust the shift alarm value: Rotate lower left knob. NOT suitable for diesel vehicles. Short press the central black button to easily adjust the brightness, with a red pointer.
3.75″ 12V Universal Car Tachometer Gauge Meter 0-8000 RPM With LED Shift Light
0-8000 RPM Electronic Tachometer Gauge Meter STAR RPM
Selling as used. Box has condition issues, rip/torn. Item itself looks well taken care of. Thank you!