The shift light pro from Omex has an ultra bright LED mounted through a bezel in the dash and can be replaced with an optional lamp or buzzer if required. The shift point can be set from 1,000 RPM to 20,000 RPM on 2 cylinder, 4 cylinder and distributor-less ignition systems, 12,000 rpm on 6 cylinder and 10,000 RPM on 8 cylinder.All Omex microprocessor based shift lights and rev limiters feature Omex's acclaimed method of calibration. Shift point and rev limit is set independently of the car's tachometer, thereby removing any instrument error by incrementing in steps of 100 RPM by simply pressing a button on the unit. Precise digital timing ensures response within one engine revolution.