GPX Wireless Music System with iPod Dock * Range: 200", line of sight; 90", indoors * Transmitter supports up to 20 wireless speakers * White backlit LCD with digital clock * 3.5mm audio line-in jack * Play/pause, skip up/down functions for iPod * Requires 6 x D batteries per speaker (not included) * Includes remote, iPod docking brackets and AC power cord