DreamGear Akai i.Sound Portable 2-Driver Speaker System in Gift Box (Silver) Portable silver speaker system for iPods, MP3 players, PSPs, and other audio devices Pair of high-efficiency drivers produce dynamic, high-quality sound Bass booster button enhances bass effect by 2 dB; surround sound button Runs on 4 AA batteries (not included) or AC power (adapter included) Max power output of 2.5 watts x 2; bonus gift box; 120-day warranty