Advanced Hi-Fi sound with Channel Purity Digital 2.4GHz ISM wireless transmitterTransmission range: 200\' line of sight, 90\' indoorsLeft, right or mono selections and independent volume settings for each speakerTransmitter supports up to 20 wireless speakers (additional speakers sold separately)White backlit LCD with digital clock3.5mm audio line-in jack for use with any portable audio devicePlay/pause, skip up/down functions for iPod On/off, mute, function and pairing controls for speakersRequires 6 D batteries per speaker (not included)Includes remote, iPod docking brackets and AC power cordLength: 16.50Width: 12.80Height: 12.80