JLab Audio Miniblaster Portable Speaker for iPod nano 2G (Black) Ultra-portable, pocket-sized stereo speaker designed for iPod nano 2G Pair of 40 mm Mylar cone drivers produce crisp, pleasing sound Ideal for the beach, camping, traveling, playing sports, and walking Runs on AC power or 4 AAA batteries; includes 35 mm auxiliary input Measures 175 x 4 x 125 inches (W x H x D); 1-year warranty