Edifier MP300Plus 2.1 Speaker System - Black Lifestyle 2.1 portable audio system for notebook, PC, MP3 and all digital media and telephony systems Bass ported, brush-finished aluminum 9W subwoofer for extended bass response Uniquely designed and magnetically shielded full-range spherical satellites with metal weave speaker grill Simple to use satellite mounted controls operate on/off and volume up/down functions