Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Keeps making hissing sound

I'm very disappointed. These speakers are a good size. But for wireless... there are still wires everywhere unless you want to keep pumping sets of 12 batteries into these babies.I could live with that part. But the real bummer is that they make a loud hissing sound every several minutes. Even when they're not plugged into my computer at all. I guess I have to return them.