As many people complained, I found this headset's microphone was very weak. The other person can not hear me at all. So I contacted Plaintronics for repair. Their repair process has no tracking, just sending in your headset to an address. Two weeks later, I received a used one back, not the one I sent in, packaged in an OEM box. Although this one has better microphone than the new one I sent in, it battery is not very reliable to hold charge, also the battery portion is kind of loose.I can not recommend Plantronics product at all.