Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beware if you own a 4th Gen Nano

This product works reasonably well for transmitting the audio signal but it does not charge (as advertised) the newer I-Pod Nano's. I bought it specifically because of the ability to charge while on the road and it does not do this. Very disappointing and it is not listed anywhere in the information from Amazon and only in the most obscure location at Griffin Technology. I'll be returning it to Amazon.