Plantronics M22 VISTA™ Wideband Modular Amplifier Adaptor

Wideband Audio -if used on a Wideband VoIP system
Clearline Audio Technology improves call quality
Loud Noise Protection
Advanced Echo Management
Background Noise Reduction
Call Volume Equalizer
Adjustable Volume Control Dial & Mute Button
Headset/Handset Selection Switch
Quick Disconnect™ for Connection to "H" Series headsets
Lightweight 3metre coil cord
Requires 2 AA Batteries (included