Bushnell Travel Tunes 1.0 Outdoor Speaker System for iPod and MP3 Players (Black) Compatibility: iPod mini; iPod nano 1G, 2G, 3G; iPod touch; iPod 1G, 2G, 3G, 4G, 5G, 5.5G, 6G; iPod shuffle 1G, 2G; any MP3 player with a headphone jack Water-resistant outdoor speaker system with universal iPod docking station (only iPods with 30-pin dock connectors fit; all other iPods work through auxiliary input) Rubber-coated exterior and rugged rubber trim protects speakers from elements Pair of 2.25-inch speakers, 5-watt-per-channel amp, and Z-Bass boost function Runs on AC power or 8 C-sized batteries; measures 13.5 x 7 x 3.25 inches (W x H x D)