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Plantronics M22 amplifier brings superior sound-quality and acoustic protection to your telephone. As well as providing compatibility with those telephones that do not allow direct connection of headsets it offers a range of additional features to enhance the sound quality of your phone conversations.
Plantronics SoundGuard Plus™ technology ensures loud tones are quickly reduced to more comfortable levels and ensures that the normal, human voice remains natural and unchanged, for face-to-face clarity of communication.
Plantronics Call Clarity™ technology uses electronic signal processing to reduce phone noise and maintain constant volume levels, as set by the user. This ensures all conversations are held at a comfortable and consistent level, regardless of the loudness of the incoming call.
Features: Noise Suppression
Features: Volume Control
Number of Batteries Supported: 2
Battery Size Supported: AA
Power Source: Battery
Plantronics AC Adapter - 84104-01
Compatibility: Plantronics Calisto Speaker Phones: 820; 825; 830