TruSpeed Controllers MT I Mosfet Transistor Pulse Width Modulation (PWM) controller. With Launch Button Installed. Simple intuitive controls on the MT I make it easy to use and quick to adapt to your racing style, car, and track conditions. Supplied with POSITIVE track wiring. PWM Drive with Transistor Braking. Brake adjustment (with automatic HOLD) Sensitivity adjustment. (with automatic CURVE) Trigger return spring tension adjustment. Current rating of 12A peak and handling 5A constant. User-Changeable Single and Double Finger Trigger Now with 36 step wiper element and 9 point contact. Auto reset PTC fuse for over-current protection. LED with triple function. Note: Optional Launch Installed on this Model. Check the spec of what you are buying, if you need Negative set up, let us know and we can arrange.