This Jam comes in a jar. This Jam comes in flavors. And this Jam can help you burn calories. HMDX Jam is a small bluetooth speaker that has Big sound. In fact, When I first paired this bluetooth speaker to my iPad, I was amazed by the sound, I actually looked around to see what was playing the music. It was that good. For the suggested price of $49.99 its worth every penny. Like everything, it has pros and cons, and the only con I can see is the only 4 hour battery life, though it still works while you are charging, (just not sure how much it charges) This 4 hour battery life is while its in bluetooth mode, if you run a 3.5 MM jack cable between your device and the Jam, it’s said you can get 12 hours. It’s also rated at a 30 foot range, but I have walked through the house with it leaving the iPad in the other room and had no issues. Last, the foot print is only 2.5″ x 2.5″ x 2.5″ so its a small. But again it has big sound. I walked around the house with the iPad, and left the Jam in one place, and I could clearly hear it. Now here is the biggest problem I will probably have with the Jam. is that my wife will probably want to take it to work with her. I might have to get another Jam for me! Oh, and to burn calories.. put on some dancing music and dance!