Cygnett GrooveBassball Compact Portable Speaker (Black) Compatibility: iPhone 3, 3G, 4, 4S, 5 and Samsung Galaxy II, S II 4G, S III Compact yet powerful Great sound and even better bass Pocket-size portable speaker Expandable design delivers dynamic sound & bass Rechargeable Lithium-ion battery for 3 hours of play-time Roam-free - play any song, anywhere Includes USB cable for recharging (USB power adaptor sold separately)