Britelink Innovations Portable Bluetooth Wireless Mini Speaker System for PC / Cell Phone / Tablet / MP3 Player, By CyberTech with 1 Year Warranty Pairing and Play or Plug and Play! Ultra portable and light weight design at just 2.5 ounces. Easy to use volume control for pairing, volume, pause, play, and previous/next track. Built-in High Capacity rechargeable built-in lithium battery. A fully single charging (about 3 hours) can support up to 10 hours of playtime. Audio transmission distance of 30 feet/10meter without obstacle. Engineered for exceptional clarity of sound. Built-in amplifier for a surprisingly loud volume. Bluetooth wireless is compatible with all touch screen tablets, smartphone, laptop, iPad, iPhone, iPod which has built-in Bluetooth setting.