MSD Ignition Digital RPM Activated Switch Features: No RPM Module Needed Program By Scrolling Through LED Display Program From 200 To 15K RPM In 100 RPM Increments Input Voltage Of 9-18 Volts Turns A Circuit On Then OFF At Certain RPM Height: 3.00 Width: 6.00 Length: 6.00 Weight: 0.90 lbs
