Sennheiser MB Pro 2 UC. https://en-us.sennheiser.com/mb-pro-1-uc-and-mb-pro-2-uc https://en-us.sennheiser.com/mb-pro-1-uc-and-mb-pro-2-uc This page shows them

Sennheiser MB Pro 2 UC. https://en-us.sennheiser.com/mb-pro-1-uc-and-mb-pro-2-uc https://en-us.sennheiser.com/mb-pro-1-uc-and-mb-pro-2-uc This page shows them all. https://en-us.sennheiser.com/business-bluetooth-headsets https://en-us.sennheiser.com/business-bluetooth-headsets The Bluetooth is excellent to both computer (using included dongle) and cell phone (which I use all the time). The microphone is extremely good; filtering out all background noise. The sound is adequate for speech and loud enough for speech. They are not good with music and the maximum volume is just over adequate. (plenty enough volume for most environments, but not enough to blast music) The headset is light and the charge lasts for hours and hours.