Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor quality - Sound "cuts out" randomly

The MDRRF970RK is impossible to use for listening to TV programs because the sound "cuts out" for 1-2 seconds at random intervals. At first I thought it was due to the battery not being fully charged but that turned out to be wrong. I ended up waiting over 30 days of testing and SONY would not take them back (policy is 30 days for returns) and I didn't want to get a "new" set since they would just repeat the same performance. I'm going to throw them away! DO NOT BUY!