We prepared the following blog in October 2020 with some options:
https://www.onsip.com/voip-resources/smb-tips/best-voip-phone-headsets-for-remote-work

Your Customer Success Team members have tried out and use/used the following headsets:

• Plantronics Vista M22 is a wired headset with two (2) ear covers. This is connected to the back of a hard phone w/headset option. Not compatible w/MAC or PC.

• Logitech ClearChat Comfort USB Headset Wired Connectivity - Over-the-head (wired USB headset - requires OnSIP App as your registered device. Also nice earpiece and mic. Very clear sound/call quality. Personally, b/c I like to walk-n-talk the wire is a nuisance.

• Logitech H390 USB Wired PC Headset for Internet Calls and Music.  Lightweight and a longer cord.

• Sennheiser DW Pro2, DW 30-US, DECT. It's a wireless DECT headset that uses either a direct connection to the back of a desk phone OR a USB connection to the computer using the computer to answer your calls (you'd need OnSIP App [web or desktop] enabled as the softphone on your computer). Nice headset, sound-canceling, really sleek, nice mic, no reported issues w/audio inbound or outbound.

• Jabra Evolve75 headsets are the latest testing headsets.  Wireless and very nice.  At least 25' before starts to lose call quality:
  YouTube video of the headset and use in an "open mic" test:
  https://www.youtube.com/watch?v=9t5ETi2_ox0https://www.amazon.com/Jabra-Evolve-Stereo-Charging-Stand/dp/B0719MD79F/ref=sr_1_3?crid=3HL9IC2ETKB91&keywords=jabra+evolve+75&qid=1555445547&s=gateway&sprefix=jabra+evolve%2Caps%2C127&sr=8-3
  
  https://www.staples.com/Jabra-Evolve-75-Headset-MS-Stereo/product_IM18V9800
  OR
  https://www.888voip.com/products/jabra-nbsp-engage-65-mono
  https://www.888voip.com/products/jabra-engage-65-stereo

• Polycom website has the following information about headsets as well (as of January 2016):
  https://support.polycom.com/content/dam/polycom-support/products/voice/polycom-uc/other-documents/en/fp37477-using-headsets-with-polycom-phones.pdf