The plantronics always come up in front with some new technology, innovation and life changing product. The Plantronics Vista M22 Amplifier is one of the new inventions in the field of headset by Plantronics. The Plantronics M22 Amplifier is one of the best audio processor especially for VoIP users. It has the ability to auto control the voice level which comfort your ears, hearing proper protection with high quality performance. The Plantronic M22 Amplifier has feature which makes you listen in noise free environment and works best with wideband VoIP. The elegantly designed with volume control and mute option. It is known to be universal compatible audio processor with telephones and others.