I've tried several Bluetooth headsets claiming to cancel background noise. Until this one, I've been left wanting. The GENNUM nXZEN Plus really works! I have a sports car with a loud engine noise and with this headset, callers haven't complained as they did with previous ones. Only four stars though because the Bluetooth connection with my Blackberry 8703e gets dropped once a day when its idle. Also, I take many calls throughout the day using my nXZEN and find it essential to recharge the battery every night - your mileage may vary.