The Auto Meter Quick-Lite Shift Lite is a replacement option for Auto Meter tachometers with the larger size light. This unit can also be used as a shift lite when used with the Auto Meter Pro-Control or any other RPM trigger. The RPM electric module allows the RPM "Pills" to be used for triggering Shift-Lites. For 4, 6, or 8, cyl., std. electronic ignitions, 12-16 volts. 1 amp max. Each pill kit includes 5 calibrated module "pills" in 200 RPM increments beginning with the first number listed. (Other pill kits are available, but these are the two most popular.)