PMTR2136 Professor Motor 35 Ohm Resistor Controller w/3.5mm Stereo Plug
Professor Motor 35 Ohm Resistor Controller - Includes single cord insulated wire harness, 3 Pin Stereo Plug for Scalextric / Older Ninco and electronic self resetting circuit breaker to protect against accidental misconnect
This controller is NOT polarity sensitive - Recommended Applications : Stock or mildly tuned RTR Cars (1/32 Scalextric, Carrera, Ninco, Monogram, etc.), stock to moderate tuned HO
Here is a review of the controller by Harry Wise from Home Racing World.
PM 35 Ohm 1/32 Resistor Controller Review
Easily upgraded with a rotary pot to provide adjustable variable braking performance