Audio Source DB5 Portable Powered Speaker System Portable powered speaker system for MP3 players, iPods, and other audio devices Plugs into any device with a 3.5 mm headphone jack, including laptops Pair of 1-inch aluminum cone drivers deliver crisp 60 Hz to 33 kHz frequency range Magnetically shielded against video interference; 7 watts total power (3.5 watts x 2) Runs on 4 AA batteries; measures 6.39 x 1.88 x 2.88 inches (W x H x D); 1-year warranty