Compatible with all popular unified communications solutions In-line call controls and USB connection The monaural design let's you hear what's going on around you Lightweight headset with large ear pad for extra comfort Noise-cancelling microphone filters out ambient noise for optimum speech clarity Flexible boom for optimal microphone positioning; cannot be twisted out of position Pivotable boom rotates through 340 degrees for wearing flexibility on right or left ear and precision microphone placement ActiveGard technology protects you from acoustic shock by preventing sudden sound surges Sennheiser HD voice quality: Wideband audio for a natural listening experience Optimised for Skype for Business