2.1 Portable Speaker System,18 Watts,3.5mm,4 Woofer,Black Color: Black , Connectivity Technology: Cable, Controls: Mute, Controls: Bass, Controls: Volume, Driver Type: 4" Woofer Subwoofer, Interfaces/Ports: 3.5mm Mini Stereo Jack , Output Power: 12W (RMS) Woofer, Output Power: 3W (RMS) per Satellite, RMS Power: 18W, Shielding: Magnetically Shielded Subwoofer, Shielding: Magnetically Shielded Satellite, Speakers Details: 2 x Satellite, Speakers Details: 1 x Woofer, System Power: 18W (RMS), System Type: 2.1 Sold as 1 each