Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't work for me.

I was never able to get this to work successfully on my system. I have to hook it into my Marentz receiver. It worked for one night, not very success, and then nothing. I sent it back for repair and it was returned saying that nothing was wrong. Perhaps it's pilot error, but it's strange that even the battery doesn't seem to charge successfully. I had great hopes for it. Maybe with a less sophisticated system.