Trust Remo 2.0 PC Speakers, 16W (8W RMS), USB Powered, Jack 3.5mm, Stereo Speaker Set with Volume Control, Compact Sound System for Computer and Laptop Black

Amazon

8 Watt RMS output (16 Watt peak power) Advanced technology for rich and powerful sound USB powered - no wall power needed Big, easy to reach volume control at the front Use it anywhere you like, even outside your home or office

Euroffice

USB powered. 8W RMS power output. 16W peak power. 3.5mm audio output. Volume control dial.