Edifier M1250 2.0/ 1.2W RMS/ USB Powered URL: http://www.edifier-international.com/products/edifier-multimedia/m1250 Type: 2.0 Sound system Colour: Black Power: RMS 0.6W x 2 Driver units: 50mm x 90mm, magnetically shielded, 4Ω Signal-to-Noise ratio: ≥80dBA Main controls: Control panel: Power, Master Volume control Dimensions: Dimensions: Active speaker: 68mm x 166mm x 94mm | Passive speaker: 68mm x 166mm x 94mm (WxHxD) Weight: ≈0.55Kg (gross) Features: USB powered, compact 2.0 multimedia speakers Flat panel designed satellites Magnetically shielded speakers Built in power and volume controls 3.5mm auxiliary input and headphone jack