Dekcell USB Powered Multimedia Speakers- 200W,USB Speakers with Digital Sound This USB powered multimedia speaker system is an attractive complement to any audio device. Powered by any USB port, this speaker system is great for laptops or PCs where power plugs are a premium. Just plug the speakers into the USB port and 3.5mm jack of any computer and you're ready to go. USB powered, no batteries or AC adapter needed. 3.5mm jack for audio input MPO: 200 Watt. Inline volume control.