The Edifier R12U are small but powerful speakers useful for anyone with a small desk space or need speakers on the go. These speakers are powered by USB. These 2.0 speakers are the ideal companion for any computer, notebook or laptop. The R12U speakers are designed to fit small space for those with limited desk space. The R12U offers a great audio performance at an affordable price. These USB powered speakers requires a 3.5mm auxiliary input in order to connect to your PC. The auxiliary input also means that you can connect with portable audio devices such as MP3 players.