Sweex 2.0 Speaker Set Arena White/Silver. RMS rated power: 2.8 W, Frequency range: 200 Hz – 81 kHz. Connectivity technology: Wired, Headphone connectivity: 3.5 mm, Cord length: 1.5 m. Compatible operating systems: Windows XP/Vista/7 Mac OSX. Dimensions (WxDxH): 75 x 71 x 190 mm, Audio output channels: 2.0, Power requirements: 100-230 V