IH13L BLUE PORTABLE SPORT CASE FOR iPod Nano. Sturdy lighweight zippered case, 2 dynamic stereo speakers, secure fit holds iPod snugly, water resistant. Attaches quickly and easily to bikes, strollers, exercise equipment and more. Built in Remote Control capability. iPod control when case is closed. 2 watts total power, runs on 4 AA batteries or included universal switching power adapter.