Portable speakers and easy to carry music every where Impedance 4 ohm, Output : 3W*2 (RMS),Power : USB 5V A computer compatible with an audio output and volume control Connectivity: Computer USB 2.0 and 1.1 Line in Jack (male) Best "sound power for its price" model in the compact computer speakers range. Brand No Brand SKU 100230042_NP-1020487036