GN 2000 Series headsets are the perfect contact centre headsets. They deliver true wideband sound quality, day-to-day durability, all-day comfort and unprecedented affordability. With frequency response from 150 Hz to 6800 Hz, the GN 2000 is the only commercial headset to meet VoIP wideband standards. Two microphone/boom combinations are available, a flex/noise cancelling combination and an industry-first flex/SoundTube model. They also include PeakStopTM technology for hearing protection. From its sturdy rubber-plastic composite to all-metal boom pivots and impact resistant headbands, every detail of the GN 2000 Series has been designed and engineered with durability in mind. Monaural version with FlexBoom microphone (Ref. : 2003-820-104), "GN1200 / SmartCord" for IP Phones included (ATTENTION : RJ9 connection not USB). For Linksys (mini-jack) adapter, please specifiy it in the commentary box at the end of the purchase process.