Frank,

I have the unit Lloyd mentioned. It is most excellent. I've been taking it to concerts and the results are quite good. I was recently 3rd row/center for a James Taylor concert and it came out really nice. It has built-in line level adjustments to make sure you're not recording signals that are too "hot". I've also been using mine to record our band practices.

As far as the one you ordered, it is also quite good. My stepmom in-law (is there even such a family tree term as this??), has one. I tinkered with hers when she first bought it. It is a handy gadget indeed, and quite easy to use. I can confirm that it will work with USB power. When you first turn it on, and the USB cable is connected, a menu screen appears given you the option to use the USB as a power source, or as a memory source (for the purpose of offloading files).

At any rate, I think you will be pleased at how good the little guy is for the price. Good luck and have fun!

Living in The Music City