FRISBY BS-430 USB speakers offers great sound quality with powerful 400 Watt PMPO and featured headphone jacks for private listening. Speakers does not require a wall power outlet, it receives power source directly from your computer. This speakers has excellent sound quality with the price we are offering. For further references, please check our feedbacks. BS-430 is portable, and equipment with earphone jack for private listening, The speaker system is magnetically shielded to provide the greatest protection against image distortion on a computer monitor, Compatible with all type of PC models, Laptops, and all Mac models. Works with any type of operating system. Simply plug and play, The system is complete, comes with all necessary cables, and accessories to hook your speaker system up to your computer, MP3 player, Discman or Walkman