Plantronics Blackwire 5210 USB-C (mono) has both USB-C and 3.5 mm connector lets you work on a variety of mobile phones. Built to be comfortable enough to wear all day.  When you’re on a call, Plantronics Dynamic Mute Alert senses and alerts you when you try to talk when muted. You can also customize voice alerts to your language of preference. In addition when used with Plantronics Manager Pro software-as-a-service you are provided with a greater IT support. Light weight. 

Key Features:

• Mono (single ear) wearing style
• Certified for Microsoft Teams
• Compatible with other softphones from Avaya, Cisco, Skype and others
• Both 3.5mm smartphone and USB-C type connection included
• Leatherette ear cushions provide all-day comfort
• Foldable ear cushions with carrying case
• One-touch call answer/end, volume +/- and mute
• User friendly audio prompts and inline indicator lights alert the user to connection, mute and volume status Plantronics’ Signature Audio
• PC wideband audio with noise-canceling microphones for high-quality PC telephony
• Digital Signal Processing (DSP)
• SoundGuard  technology provides advance audio protection
• Dynamic EQ automatically adjusts audio settings between voice calls and music
• 2 year warranty

Old Poly part # 207587-01

New HP part # 805H4AA

Also see Plantronics Blackwire C5210 USB-C datasheet

Important note: this is the smaller USB-C, not the regular USB-A connector which is larger