E-blue ESK006B00. RMS rated power: 6 W, Frequency range: 120 - 18000 Hz, Signal-to-Noise Ratio (SNR): 80 dB. Connectivity technology: Wired, Connector(s): USB. Compatible operating systems: Windows 2000/ME/NT/XP/Vista/7 Mac OS X 10.2 +. Dimensions (WxDxH): 152 x 68 x 68 mm, Audio output channels: 2.1, Power requirements: 5V