XMI X-Mini ME XAM16-B Portable Thumb Size Speaker for iPhone/iPad/iPod/MP3 Player/Laptop - Black Super Portability - Loop a lanyard or keychain around the metal bar and bring it everywhere you go Impressive Playback Time - Up to 6 hours of playback with easy Micro-USB charging Compatibility - Simply plug and play with your Smartphones, tablets, laptops and portable game players Carefree, hassle-free, wearable technology Dimensions: 44mm x 38mm