MSD Ignition Power Grid Ignition System Controller Features: USB Connection For Ease Of Programming Timing Based On Engine RPM And Gear Value Advanced Individual Cylinder Timing Five Retard Stages For Nitrous Four Steps Of RPM Limits Output Switch Set On RPM/Pressure/Time Shift Light Settings For Each Gear Ignition Data Acquisition Accepts Multiple Runs Height: 3.00 Width: 8.00 Length: 11.00 Weight: 4.80 lbs