Eurus Portable Audio System Speaker for iPod 1G 2G 3G 4G Mini Nano and MP3 Player with 3.5 mm jack (white color) 2x1 W output power 200 Hz - 12 KHz frequency response 50 mm speaker, 4 Ohms lengt7-inch 3.5-mm cableh (approximate) Power input: four (4) AA batteries or AC adapter (DC 6V, 350 mA)