Supercharge your headset with the addition of a ZoomSwitch ZMS20-UC. Use one headset, and switch between your desk phone and your PC at the touch of a button. Expand the functionality of your existing office headset by connecting it to your computer through the USB port. The ZMS20-UC features a convenient mute button that quickly mutes your microphone on phone and PC calls and a volume control dial that amplifies the sounds you hear on the computer side. It's simple and powerful. The ZMS20 is the perfect device to enable your wireless or corded office phone headset to work with UC applications like Microsoft Office Communicator ( MOC ), Cisco IP Communicator, Avaya one-X, Skype, IBM Sametime, and more. Also great for use with speech recognition software. Compatible with Plantronics and similar corded and wireless headsets. Works with all major phone brands and most adapter cables.