DESC: GN Netcom, a world leader in hands-free communications solutions, introduces the next generation of professional headsets - the GN 2100 Series. Sleek and lightweight, the GN 2100 Series SoundTube headsets are the first ever to use Acoustic Transmission Line (ATL) technology - the first significant advancement in voice tube technology and design. GN Netcoms ATL technology eliminates sound reverberations and distortions usually assoicated with voice tubes. The results - superior sound quality.