Realistic Lights, Sounds, and Vibration Multi-Function Control Unit (MFC-01) offers lights, sounds, and vibration in combination with R/C truck action, for a truly engrossing R/C experience. Engine sounds have been digitally recorded from an actual truck, and together with air horn, gear shifting, and many other realistic sounds, let you feel like you are driving the real thing. The unit is compatible with up to 20 total LEDs of 9 different types: headlights, brake lights, and turn signal operation are also available at your fingertips. It features a built-in electronic speed controller function to allow smooth rides at speeds ranging from very low to standard.