Professional headset for greater productivity and amazing sound for calls and music. To block out distraction, the headset contains passive noise cancellation and has a special busy light that turns Red to let people know when you’re on the phone. You can also turn it on Manually when you don’t want to be disturbed. If you are heading out of the office, easily transfer your Skype for business and Lync PC calls to your smartphone and continue the call while on the go.