Speed-Link SL-8003-SBK. System type: 2.0 system, Recommended usage: notebook, Speaker placement: Portable. RMS rated power: 2.5 W, Frequency range: 80 - 18000 Hz. Connectivity technology: Wired, Speaker interface type: USB, Headphone connectivity: 3.5 mm. Housing material: Plastic. Width: 87 mm, Depth: 75 mm, Height: 89 mm