Altec Lansing VS2421 2.1 Music and Gaming Stereo Speaker System with Microphone (Black) Custom-engineered full-range 2.5-inch ported speakers deliver clean, full-spectrum sound with outstanding accuracy Slim 5.25-inch speaker that shakes the room without taking up a lot of room Built-in microphone for internet communication Small footprint, wall-mountable design Headphone, iPod, MP3 player jack