*Discontinued*  Replaced by GN 2124 Direct Connect

GN 2127 Noise cancelling on-the-ear headset are Sleek and lightweight, this GN 2100 uses Acoustic Transmission Line (ATL) technology—the first significant advancement in voice tube technology and design. GN Netcom’s ATL technology eliminates sound reverberations and distortions usually associated with plastic voice tubes. It's 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 binaural headset (you hear through two ears), and the 2110 is monaural (one ear). The binaural design improves audibility of weak voices and blocks out distracting ambient sounds and nearby voices. 

Key features:

• Specially designed for telephones with modular Headset jacks built-in the telephone. (marked with the word "headset" or have a symbol of a headset).
• Quick Disconnect / Modular cord included
• ATL technology for superior sound quality
• Incredibly lightweight (just 1 ounce)
• Omnidirectional and noise-canceling microphone
• Click-stop headband and SureFit flexible earhook
• Swing-away boom
• Leatherette and foam ear cushions
• Only compatible with modular headset jacks

For more details see GN Netcom 2127 datasheet