3 Transistor design for 50% more capacity, Convert your Turbo frame/controller into a drag controller. DRAGTROLLER T.Q. MODULE - All the features of the Dragtroller Pro, plus more. Momentary push-button allows you to glue car without using the trigger, no hunting wiper bands for the right glue speed. Push-button also has a small adjustment pot that can be used to shift the rollout sensitivity to get the best range for your motor.