Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Compact, very helpful

I bought this product with the intention of using it to charge my iPod while travelling and not near a computer... It was quite perfect. Not only is it very small, the prongs fold into the body, but it is easy to use and worked great with a voltage adapter, as I was travelling internationally. Also turned out to be useful when someone in our house wants to charge an iPod without the risk of someone's computer altering songs. Overall great thing to have, and from amazon, it was about half as much as apple was charging for the same thing.