Functions as a radio, digital media bay and battery charger all in one. Plays MP3 players, plays CD players, plays SD memory cards, and plays USB thumb drive storage devices. Operates on standard AC power or any Bosch 12V, 14.4, 18, or 24V battery pack. Features a 4-way GFCI protected outlet that meets OSHA requirements which can be used to power-up tools and equipment. Radio stations can be preset for FM (20 stations) and AM (10 stations). Aluminum roll cage protects the unit from a 10 foot drop. Buttons, speakers, battery chamber and media bay are dust and weather resistant.