Aluminum hinged-stetho headset. The aluminum hinged headset delivers consistent digital sound & pristine clarity with a high level of comfort. Because of its light-weight structure, it is considered the ultimate choice for professional transcriptionist. This headset fits most transcribers (3.5, 2.5 and 2 prong Dictaphone brand jack fittings) Please tell the sales person the make and model number of your transcription device before ordering.