Works perfectly, even with 2 phones simultaneously

This headset is great. It can maintain the Bluetooth connection with two phones at the same time, which makes the use with PC (VoIP) and mobile phone easy. However, the volume rocker else seems to be a step switch no rocker. So you can not directly turn quieter, but must shift through all three or four stages until we were "quiet" begins with.
Understanding and battery life are properly.
However, it is so "handy" that I rarely manage to set up without pressing any button - but this, in my case triggers nothing but a peep.