OVERVIEW:Plantronics Voyager Focus UC B825-M Binaural unified-communications Bluetooth headset for PC / notebook desk phones and mobile phones / smartphones Noise-cancelling microphone filters background noise Digital Signal Processing (DSP) for natural audio Active Noise Cancelling (ANC): Filters out background noise so you can concentrate on your work Smart sensor technology pauses music when a call comes and lets you answer a call simply by putting on the headset Synthetic leather ear cushions with memory foam and padded metal headband for a comfortable and secure fit|FEATURES: Certified for Microsoft Lync Compatible with PC cell phones and tablets Smart sensors answer calls by simply putting on the headset mute by taking the headset off and pause music for incoming calls Enhanced voice alerts announce caller ID mute and connection status talk time level Mute Alert senses and alerts you when you try to talk when muted Smart mic boom: wear on either side and maintain locations of R/L stereo and volume/track buttons Active noise cancelling (ANC) stereo speakers Precision tuned triple-mic with enhanced digital signal processing (DSP) for superior background noise cancelling Wideband stereo provides hi-fi stereo sound Leatherette ear cushions wrapped around pillow-soft memory foam Cushioned metal headband provides durability while maintaining a comfortable secure fit Easily take the headset on the go with folding ear cushions and included carrying case|