This weather resistant, wireless speaker lets you enjoy rich multi-directional stereo sound anywhere. The system has a broadcast range of up to 350 feet,. Listen to any MP3 player, iPod, computer, home theater, audio system, or your TV by choosing either the UAT or the iCast transmitter (both sold separately). This system includes a rechargeable battery, offboard charging system, a 12volt adapter cable, power cord for direct connection to any outlet, and a 3.5mm line input for direct play. NMh battery allows for 5-9 hours of uninterrupted play.