*Discontinued* by Jabra.  See the new GN 2119 Direct Connect 3-in-1 Headset instead

GN 2117 SoundTube on-the-ear headset are Sleek 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. 

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 eliminates sound reverberations
• Convenient swing-away boom
• Omni directional microphone
• Full-size leatherette ear cushion
• Only compatible with telephones with modular headset jacks

For more details see GN Netcom 2117 datasheet