Includes wiring harness, controller, software and lap-top hook-up. Allows the use of electronically controlled transmissions in early model vehicles. Fully programmable for upshift, downshift, part throttle and wide-open shifts and shift firmness. Comes pre-programmed, just enter your rear tire diameter and rear axle ratio and go, or create your own custom shift characteristics. Originally developed by GM Racing for off road truck racing. The controller has the ability to record and graph drag race data like time, speed, shift point, engine rpm and more. Requires a throttle position sensor on carbureted applications, see instruction manual for specific parts required.