Wintech SP-200. System type: 1.0 system, Recommended usage: universal, Speaker placement: Floor, Wall-mountable. RMS rated power: 5 W, Frequency range: 90 - 20000 Hz, Impedance: 4 Ом. Connectivity technology: Wired, Speaker interface type: USB. Width: 205 mm, Depth: 30 mm, Height: 25 mm. Compatible operating systems: - Win 98SE/Win ME/Win 2000/Win XP/Win Vista/Win 7 - Mac OS 9 / OS X