Plantronics Blackwire 320 USB Headset, On-Ear Mono Headset, Wired USB HEADSET: Hi-fi stereo USB headset with microphone (Blackwire 320) is ideal for those who want a richer, immersive experience. SECURE FIT: Plantronics Blackwire 300 Series has a lightweight metal headband for durability and a custom, comfortable fit. INTUITIVE DESIGN: Simple, intuitive, inline controls on the USB headset let you answer/end, mute, and control the volume of PC calls with ease, while smartly placed indicator lights and in-ear audio alerts provide helpful but non-obtrusive user call, mute, and volume status. DYNAMIC EQ: Unique Dynamic EQ adjusts and optimizes settings on the fly, creating the best sound for voice, music, or multimedia on your microphone headset. COMPATIBILITY: Plantronics headset is built to work with Amazon Connect, Chime and other UC applications and softphones from Microsoft, Avaya, Cisco and others.