This is a Synapse professional slot car controller system, consisting of a handheld controller with a clear housing and a separate control box. The controller features a red circuit board with multiple adjustment knobs and potentiometers for settings like choke and brake. The main control unit is housed in a clear acrylic case, revealing its internal electronics, which include an LCD screen, a cooling fan, an Arduino-like microcontroller, and relays. The unit is connected via wires with alligator clips for track connection. The approximate dimensions of the main control box are 6 x 3 x 5 inches. The system shows signs of use and requires cleaning. This item from Synapse Slot Racing is designed for serious hobbyists and professional racers, featuring advanced adjustability for impeccable performance.