The DH-50 is the most popular of all tubular style headsets.  This Underchin Bow (U-Shape) Headset provides a crisp, clear sound delivery.  It is comfortable with a non-invasive manner of cushioning that rests against the ears.It's compatible with all Lanier, Sony, Craig, Olympus, Panasonic, and Norcom transcribers with 3.5 mm Jack .