Unlike conventional speakers that generate sound from the center of the speaker panel and deliver a narrow scope of optimal sound, this stereo system uses Distributed Mode Loudspeaker technology to disperse sound from the entire speaker panel, creating a wide range of tonal balance to expand the speakers' audible "sweet spot." The stereo system's slim, 5 watt flat panel speakers can be mounted on the wall, yet take up less depth than a standard picture frame. The compact head unit houses a CD player, an integrated iPod dock that charges iPod while playing, and a digital AM/FM tuner with 20 station presets. The powered subwoofer has its own power source, ensuring low bass frequencies without draining power from the loudspeakers. CD player is compatible with all types of CDs and has a motorized door that opens vertically. The tuner features LCD display with backlight, digital clock with sleep timer, and the iPod dock is compatible with all iPod models. Unit includes headphone and audio input jacks, a remote that controls basic iPod functions, and five iPod dock adapters. Each speaker 8 1/4" W x 6 3/4" H x 3" D. Head unit 10" W x 6 3/4" H x 4 1/2" D. Subwoofer 6 1/2" W x 9 3/4" H x 13 1/4" D. (18 lbs.)