All-weather, outdoor speaker system. Includes iCast transmitter for use with the Apple iPod. Allows connection of other audio devices – MP3 players and computers – using the auxiliary input/output jack. Transmits signals up to 350 feet outdoors. Features buttons for pause/play and track forward/track back for remote iPod operation. Easy set-up. One 8” downward firing woofer. Four 3” high frequency drivers in an omni-directional array. 100 watt digital amplifier. Made of water resistant plastic. Operates for up to 10 hours on the builtin, rechargeable battery pack. Internal AC power supply that can recharge the NiMH battery pack and operate the system at the same time. Transmitters search for open channels in the 2.4GHz band, and instantaneously jump to them – ultimately avoiding interference and allowing for unprecedented sound quality. Product Dimensions: 16.2 x 16 x 33.5 inches; 40 pounds.