Jabra/GN 2120 Flex series noise canceling headsets are ideal for demanding applications, especially noisy environments. Jabra GN2120 incorporate a flexible boom which ensures correct microphone positioning, and a noise-canceling microphone that filters out distracting background noise. GN2120 is lightweight, very durable, and extremely comfortable, even if worn all day long. A click-stop headband provides a customized fit and pillow-soft ear cushions rest gently over the ear. This model is a monaural headset (you hear through one ear). Key features: Noise-canceling and ultra-noise-canceling options available for demanding environments BroadBass speakers DuraFlex II cable and boom Excellent combination of durability and quality Requires a Janra Link 850 amplifier or GN1200 SmartCord.