Poly EncorePro EP515-M USB-A, USB-C mono Microsoft Teams Certified. The EncorePro EP515-M is a over-the-head, single ear headset, comes with USB-A or USB-C connectors. Remote firmware updates usbing a computer. light weight design. Also Telecoil Hearing Aid Compatible (HAC) 

Key Features:

• Microsoft Skype for Business and Microsoft Teams Certified
• Over the head only wearing style
• Telecoil Hearing Aid Compatible (HAC) 
• Composite materials resulting in an light headset
• Soft foam soft ear cushions
• Inline controls on the cable to allow answer/end, mute, and volume adjustments
• Wide band audio providing natural voice transmission
• Compatible with other UC applications and softphones from Avaya, Cisco and others
• PC Windows and Apple Mac OS compatible
• Noise-canceling microphone
• SoundGuard  hearing protection against loud spikes
• Two year limited warranty

For more detail information, see Plantronics HW515-M datasheet