Frisby BS360 PC 2.1 Amplified Subwoofer Computer Speakers 1200 Watt PMPO and 32 Watt RMS powered Treble, Bass, Volume Controls with 2 amplifed speakers Both speakers and the subwoofer are magnetically shielded Compatible with all PC models, Laptops, and all Mac models, mp3 players, discmans, walkmans equipped w/ headphone jack The system is complete, comes with all necessary cables, and accessories