Amazon.com: Jabra Evolve 65 UC Wireless Headset, Mono – Includes Link 370 USB Adapter – Bluetooth Headset with Industry-Leading Wireless Performance, Passive Noise Cancellation, All Day Battery : Electronics
Jabra Engage 55 Mono DECT USB-A Computer Headset, Teams Charging Stand
Mono Headphones
4001 Passive Mono/Stereo Headset - General Aviation Headsets - $149
Jabra Engage 65 Mono Wireless Headset - Headsets Direct
Sennheiser 230 Mono Bluetooth Headset with USB Dongle, UC, Teams Certified, Connects to Deskphone, PC/Mac, Smartphone - Works with Zoom, RingCentral, 8x8, Vonage (1000881)