Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Generic transmitter for generic mp3 players.

If you have an iPod, Sansa, or any other popular, name-brand mp3 player, then this probably isn't the transmitter for you. What's good about this transmitter is that it does have decent sound quality, considering its size and the range of FM stations that it broadcasts. It does have a 2.5 mm audio input jack. (It would have been more useful if it were a 3.5 mm audio input jack.)Pretty much, though, what you see is what you get. Remember that it's for mp3 players, and not for flash drives. Just because you can store mp3 files on a USB flash drive does not mean that it contains the instructions to transmit music through the FM transmitter. All in all, it's not the best and it's not the worst. For the price, if you have one of those no-name mp3 players, this could be what you're looking for. Also, do make sure that you read the instructions and convert mp3 files to the appropriate KHz rating for optimal playback.