Product description : Sweex - SP0211 Product type : multimedia speaker Speaker type : active Connectivity technology : wired Output rated voltage: 9 Watt Features: Magnetic shielding: yes. Audio output channels: 2.1. Mac compatibility: yes. Power consumption: 1.1 W. Dimensions (L x D x H): 65 x 70 x 176 mm. Subwoofer dimensions (L x H x D): 170 x 192 x 171 mm. Power requirements: 230 V. Frequency range: 20 - 20,000 Hz. Cable length: 1.4, 1.2. Number of satellites: 2. Subwoofer RMS power: 5 W. Peak power output (PMPO): 60 W. Satellite RMS power: 4 W. RMS rated power: 9 W. Compatible operating systems: Windows 7, Vista, XP Mac OS X Subwoofer speaker size: 7.62 cm (3 inches). Satellite speaker size: 5.08 cm (2 inches). Connection technology: Wired.