Diamond Multimedia Mini Rocker Mobile Portable Wireless Bluetooth Speakers for iPhone, iPad, Smartphone and all other Bluetooth Devices - Black (MSPBT200B) Works With All Mp3 Players, IPod, IPhone & Notebooks Bluetooth 2.1 + Edr Streaming Range: 10m Outdoors 6 Hours Play Time Built-in Retractable Cables Bluetooth specification 2.1(class 2)+EDR Support Profiles: A2DP/AVRCP Stable streaming on Bluetooth wireless technology Working distance:10m (outdoor operating space) 6 Hours of Play Time Power Output: 4W Rechargeable Li-Polymer Battery Works with all MP3 music players, iPod, IPhone and Laptops