HP Poly BW 3220 Stereo USB-C HS +USB-C/A 80033865 8X228AA Product Description: Poly Blackwire 3220 - headset Product Type: Headset - wired - USB-C Compatibility: Mac, Windows Recommended Use: Portable electronics, computer Colour: Black Headphones Form Factor: On-ear Connectivity Technology: Wired Sound Output Mode: Stereo Audio Specifications: Sensitivity 90 dB Impedance: 32 Ohm Signal-To-Noise Ratio: 118 dB Microphone: Boom Microphone Operation Mode: Omni-directional Controls: Mute, volume, answer/end, hold, redial Software Certification: Skype Certified, Cisco Jabber Certified, Avaya Certified, UC certified