dreamGEAR 3.5mm i.Sound GoSonic Portable Speaker ISOUND-5209 Type: Portable Speaker Compatible Phone Manufacturer: Apple Driver: 2 x 2 / 50.80 mm Output Power: 5 W Frequency Response: 50 Hz - 20 kHz Impedance: 4 ohm Features: Ideal for iPad, iPhone, iPod MP3 players, laptops, smartphones, handheld gaming systems, and any other audio devices with a 3.5mm audio jack Built-in rechargeable battery charges in about 2.5 hours using the included USB cable, and lasts for about six hours Onboard volume control and on/off switch Comes with a soft travel bag for maximum portability