Sennheiser MB 660 review: Sounds like a winner | ITPro
Sennheiser Bluetooth Headphones with Microphone MB 660 UC with Active Noise Canceling - Global Teck
EPOS I SENNHEISER ADAPT 660 - Headset - full size - Bluetooth - wireless - NFC - active noise canceling - black - Certified for Skype for Business, Certified for Microsoft Teams - Walmart.com