Atlantis Land SoundMaster 3500. RMS rated power: 13 W, Frequency range: 50 - 20000 Hz. Connectivity technology: Wired. Weight: 18400 g. Audio output channels: 2.1, Subwoofer dimensions (WxHxD): 140 x 250 x 235 mm, Surround speaker dimensions (WxHxD): 90 x 100 x 138 mm