Rosewill 2.1 PC Computer Subwoofer Speaker 25W RMS System (SP-5330) Output Power: 25 watts (RMS) Integrated power, volume and bass control Enhanced air follow construction with large 2.75" driver unit for realistic and wide mid to high frequencies Ideal for use with a PC, notebook, DVD player, game console, TV, and CD/MP3 players Intuitive controls for central access for volume and bass Subwoofer: 5"