Syba USB Powered 3.5mm Audio Laptop Speaker CL-SPK20138 Clip-On Soundbar - Portable Compact Travel Stereo Speaker Bar Design Uses USB for Power 3.5mm Jack for Audio Black.

.Connect land CL-SPK20138 speaker is a light weight. USB powered sound bar. Simply connect it to computer 3.5mm jack to begin enjoying unmatched Stereo sound. Easily attaches securely on top of most laptop computers with easy plug-and-play setup. Requires an USB port for power.
.Rated power: 2 x 2.5W. Full-range stereo sound and compact size optimized for mobile listening
.Frequency response headset: 150Hz - 20, 000Hz
.USB POWERED (Require 5v From USB Port): Both speakers draw all their power through the USB connection so you don't have to worry about finding an outlet or carrying around an adapter.
.3.5mm AUDIO PLUG: Audio plug quickly connects to most PCs and mobile devices. Need to connect audio plug to computer for sound to operate. The USB cable is 48' long.
.Cable length: 48"