The HMDX Jam Bluetooth Portable Speaker ian ultra-compact, ultra-portable speaker which is perfect for use with your smartphone, tablet, MP3 player or laptop This tiny speaker comes in its own colour-matched jam jar and delivers a surprisingly big sound for such as small speaker. With its built-in rechargeable Lithium-Ion battery, the Jam can run for up to 4 hours when wirelessly connected to your Bluetooth device, or up to 12 hours when using a wired connection via its stereo minijack connection. It can also be easily charged using the supplied USB cable from a laptop or other USB device or from the mains using a separately available USB mains charger. With a range of up to 30 feet, the Jam is perfect for use around the house, down the garden, by the pool or for taking out and about.