Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor sound, even worse earbuds

Strapped for cash, I've been forced to stick with this player for a couple years. The player has indeed taken lots of knocking around, but I have two complaints:1) There is background hum behind all my music. You can really hear it between songs and during quieter passages. Because of this, I couldn't use it to listen to electronic books because the hum was so darn loud and annoying. An email to Rio tech support asking about this was ignored, which really cheesed me off. Their support is awful.2) The wires to the earbuds broke during the second use. I've had duct tape on them for the last two years, but they permanently gave out the other day (something broke in the connector where even tape could not help).