Multi-Function Control Unit for European Style Trucks Built in speed controller Includes LEDs head and tail lights Large quality speaker 33 sounds recorded from a real truck Vibration unit included Up to 21 functions can be controlled from a 4 channel transmitter(not included) This unit adds a whole extra layer of realism to driving and allows transmitter trim levers to be combined with stick control, meaning you can enjoy lights, sounds and vibrations co-ordinated with actions while driving your model. Features engine sounds which were recorded from a real European truck for amazing realism. Features 33 different types of sound, a full-range speaker provides excellent quality sound. Up to 21 actions can be controlled using a 4 channel transmitter. Includes white, red and yellow LEDs to duplicate the truck lights. Built in speed controller to the unit enabling realistic running at low speeds.