Altec Lansing VS4121 computer speaker set includes the left and right satellite speakers. These powered audio system speakers feature a sleek grey and black design with integrated controls for volume, treble, and bass on the right satellite. Designed for use with the VS4121 subwoofer (not included), these speakers utilize a specific multi-pin DIN connector and RCA connection to deliver clear audio for your desktop setup. Ideal as replacement satellites for an existing VS4121 system.