Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Plantronics 645 Bluetooth Headset

Overall, the unit is ok. Not a glowing review but if no wired headsets were available, I would use this. The quality on my end is very good. However, most people on the other end of the line complain of poor quality audio, clipping, and static. As soon as I terminate the bluetooth connection they instantly say, "that's much better!"I have the unit paired with a Blackberry Pearl 8100. Hopefully those of you using the Pearl will have better success pairing with this headset.