Lync-optimised stereo headset for Vo IP softphone, mobile phone and tablet - Premium sound experience ? - Active noise -cancellation technology and large around-the-ear cups designed to reduce unwanted noise ? - USB adapter with 3. 5 mm jack integrated into the control unit allows you to easily connect your headset to your PC, smartphone and tablet ? - Busy light signals user availability ? - Microphone boom arm can be integrated into the headband when not on a call or simply listening to music ? - Microphone mute on boom-arm -? Leatherette ear cushions ? - Soft pouch included ? - Listen-in feature