The Plantronics M22 amplifier provides superior sound quality and acoustic protection to your telephone. Best of all, this amplifier is designed to adapt to almost all single and multi-line telephones. With high quality sound, this amplifier allows for lower listening errors, repeats and listener fatigue.
Adjustable incoming volume control up to 18dB
Adjustable outgoing volume control up to 12dB
Reduces echoes for more natural conversations
Quick disconnect allows you to easily disconnect from your headset
Coiled cable extends to provide 8-10 feet of reach