Gadget.Cool Mini Line-in Wireless Speaker - 3.5mm Audio Jack, Plug & Play, Compact & Light Weight Design, Powerful & Clear Bass, Built-in Battery & Micro USB Port, English Manual (black) Compact and light weight design mini speaker only a size of golf ball so you can carry it with you anywhere, 3.5mm audio compatibility Premiun build quality with 3W output power, 27mm 8 speaker diameter offers your clear bass in a small body Built-in 250mAh battery, for every 50mins charge you can use up to 6 hours play time, auto turn-off after 5 mins idle (constant playing mode available) Truly 'wireless' speaker ,easy connection for day to day use, just plug in, turn on and play in 2 seconds, share music or movie with friends Well-protected individual retail package, with an extra bonus of a multi-function phone wallet/phone stand