Sentry SPTWR 2.1 Surround Sound Speaker Sound Tower Stereo sound tower system designed for your HDTV, DVD player, stereo, MP3 player, iPod, iPhone, game systems, CD players, cable, satellite, home theater system and more Multi-angled speakers in tuned cabinet disperses rich, full sound of music throughout entire room; features full, deep bass, crisp, clear highs, and warm middle tones Specially designed cradle holds portable music player device including iPod, iPhone and MP3 player; includes remote control Measures 9-inches wide by 36-inches high by 8-3/4-inches deep Impedance: 4ohm; frequency: 80Hz-18KHz