Poly Plantronics Blackwire 3310-M UC Mono USB Headset - Microsoft Teams Certified - Headphones Form Factor: On-ear - Connectivity Technology: USB-A Wired - Sound Output Mode: Mono - Frequency Response: 20 - 20000 Hz - Sensitivity: 94 dB - Impedance: 32 Ohm - Microphone: Boom - Microphone Active Noise Cancelling - Controls: Mute, volume, answer/end - Software Certification: Certified for Microsoft Teams - 767F7AA - 2 Years Limited Warranty