Vista M22

Vista™ M22 Amplifier with Clearline™ audio 

Allows H-Series headset to be compatible with most office phones
Volume dial lets you quickly adjust your speaker volume
Background noise reduction will reduce the level of background noise
One touch Mute Button
Easily switch between headset and handset
Echo management reduces echo associated with VoIP telephony
Supports more natural-sounding speech on wideband networks
Uses 2 AA batteries (Included) - A/C power supply sold separately
Part 43596-40