Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 90 days labor. after that, if it breaks, I'll replace it

Like other people said, the strap over the head could get uncomfortable.It does feel like you'll need to care for it, or it'll break.But the audio is. nice frequency range. Like others have suggested, you turn up the volume on your computer and media application. I am listening to Buble and he sounds great.I assume Sony put the value in the electrical components that provide the audio, and not into the ergonomic engineering, for less than $40.But wireless is wonderful. When you go into another room, and lose the audio, there is no unpleasant noise. It just quietly resumes play when you get within 7 meters line of sight again.