The Champion Wireless Products portable speaker and case is perfect for smartphones, cell phones, MP3 Players, laptops, and other 3.5mm ported devices. Simply place and plug in your 3.5mm ported device inside (optional) the protective case and it is ready to blast your favorite tunes anywhere. Ideal for playing music outdoors, the convenient zippered pocket area helps to keep your portable device protected from pool splashes.3.5mm ported devices can connect simply to the speakers via an included standard 3.5mm input cable. The Champion Wireless Products portable speaker plays music loud and clear with extended depth and clarity in high quality stereo sound. Each speaker measures in at 1.25 inches, included hanger clip lets you clip and go on to a golf bag, backpack, belt loop and more. The Champion Wireless Products portable speaker requires two AA batteries (not included).