*Discontinued* by Jabra.  Replaced by GN 2125 Direct Connect Noise Canceling binaural headset 

GN 2115 SoundTube・headsets areSleek and lightweight, this GN 2100 SoundTube™ model 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. The binaural design improves audibility of weak voices and blocks out distracting ambient sounds and nearby voices. Retail Price $145.00

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).
• This headset includes the GN 1200 Smart Cord
• ATL technology for superior sound quality
• Convenient swing-away boom
• Omnidirectional microphone
• Full-size leatherette ear cushion
• Only compatible with modular headset jacks

For more details see GN Netcom 2115 datasheet