The Carrera Wireless 2.4 GHz Speed Controller Set enables a completely new sensation of movement and freedom while racing. Each control uses 2.4 GHz radio control technology providing uninterrupted frequency-independent operation at ranges up to 49.21 feet away from the base! A powerful Lithium-Polymer battery ensures up to 8 hours of non-stop racing action with a fully charged battery that can last up to 120 days in standby mode. This wireless control is perfect for the slot car racing enthusiast who wants to move about the racing circuit or just step away from the crowd when racing with up to 6 other racers. This control set comes with 1 2.4 GHz wireless speed controller, 1 wireless receiver, 1 single charging station, 1 adapter unit, 1 shoulder complement, 1 end section outside shoulder, and 1 lithium-polymer battery.