The HS850 is a very good headset with lots of features but...1. The volume in the headset is very low. Now this may be me, the phone or something else but personally it is too low.2. Like all BT headsets I have used, it lacks a mute button on the device.Otherwise, the flip open is great and the sound quality of the MIC is very good. If you have good hearing, get this one, otherwise choose another.