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The Big Jambox has a large battery so you need to use the included charger for the most economical charging. You can use microUSB, but it trickle charges very slowly. Jawbone also includes a stereo cable and a microUSB cable in the same color as the speaker you select.
The 3.5mm stereo cable, 30 inches in length, is used to connect to devices that do not have Bluetooth support. I have found this useful for connecting to a DVD player while watching movies on a projector.
I love that the Big Jambox has six control buttons on top so you can control your media without ever touching your mobile phone. This is the only unit of the three that supports this capability.