Designed as an engineered package with our throttle stops, the TSC2A, two stage controller provides a single timed output ("ON" at timer 1, "OFF" at timer 2) for optimum control over any brand of throttle stop, nitrous system or electric shifter on the market today. Developed to allow the throttle stops to launch at wide open, close at a preprogrammed time, and reopen for a top-end charge.