COMPATIBILITY: Plantronics headset is built to work with Connect, Chime and other UC applications and softphones from Microsoft, Avaya, Cisco and others. ENHANCED AUDIO: Noise-canceling microphone headset with wideband audio and enhanced Digital Signal Processing (DSP) delivers clear, natural, and rich audio. SECURE FIT: Plantronics Blackwire headset features a lightweight metal headband for durability and a custom, comfortable fit. SIMPLE DESIGN: Microphone headset allows you to easily manage calls from PC using USB-C type connection, and inline controls let you answer/end, mute, and control the volume of PC calls with ease. USB HEADSET: Hi-fi stereo USB headset with microphone (Blackwire 3220) for those who want a richer, immersive experience.