This space-saving GEMPU1-0G 2-piece speaker set is USB powered and delivers crisp and clear sound to your desktop. Since it's USB powered there is no need for a power adapter, simply plug the GEMPU1-0G into an available USB port. The 5-foot cable length provides you with plenty of room to place the speaker set where you want them. Use the dial to turn on and control the volume level. The attractive black and silver color scheme is sure to complement any environment!Order today!