The Xmini is a tiny technical miracle the size of a golf ball that's been chewed on by Laika - when closed. When opened, it folds out like an accordion to provide the resonating cavity required for a mighty big audio effect. Hearing is believing! It comes with a double mini-USB cable that plugs into the device and a powered USB port (for charging only) or a 3.5 mm audio out port suitable for most devices. An amazing little thing!
But again, under-marketed. Those Lifetrons guys need to do something, and quick, the competition isn't sleeping. Compare the Powerstick - it doesn't even pack a sixth of the performance of the Lifetrons product (which is still not available on their own web store!) with a similar form factor, but it is much more visible and will therefore sell a lot better. Wake up, guys!