Whenever I am on a call, the person on the other line has a hard time hearing me speak.  The volume control does not help adjust this for the boom is too far away from my mouth.  The paring between it and my phone took way too long to perform and still is not working right.  The first phone I tried using with it, continued to lockup every day after attempting the paring and new software on it did not resolve the matter.  The new phone is working better, but did not expect all these diversions that still do not have me working in a satisfactory manner.  Cool conception...just not working too well.