Monoprice USB 2.0 Virtual Surround Sound Gaming Speakers, Touch Input, Black (109746) The speakers use a USB 2.0 input from a PC or Mac computer and also support line-in via a 3.5mm audio jack This set of speakers is designed with a large bass resonance chamber which greatly improves bass response and overall soundstage They measure 7.9" x 2.7" x 3.5" and weigh about 1.1 pounds each