This is the most affordable UC headset in its class. Advanced microphone noise cancelling technology keeps conversations crystal clear. Acoustic Shock Protection (ASP) technology prevents volume spikes or high pitched tones. The adjustable headband creates a truly customized fit and the adjustable microphone boom allows for optimal audio pickup. These headsets feature Plug and play simplicity with a USB connection to your PC. Audio compatibility with in line control for UC applications and soft phones like Avaya, Cisco, IBM, Microsoft Lync, Skype and more.