Plantronics Vista M22 universal modular adapter
	
Replacement for the M12
	
For use with any Plantronic quick disconnect headset
	
Operates on 2 AA batteries (included) or AC adapter(not included)
	
Manual scroll volume control
	
Headset on/off switch (switches between headset and telephone handset)
	
Mute button
	
ClearLine Audio technology
	
Wideband audio (totally compatible with existing systems and "wideband ready" to deliver superior audio on integrated wideband (VoIP) systems)
	
Protection from loud noises (delivers greater protection against sudden loud noises by quickly reducing them to comfortable levels)
	
Phone line noise reduction (filters incoming and outgoing phone line noises, such as high-frequency hissing, making conversations clear, less fatiguing and more comfortable)
	
Call volume equalizer (equalizes the level of all calls to the same comfortable, user-preferred listening level)
	
Echo management (eliminates echo problems introduced by latency inIP networks; so even if your new IP phones do notrequire an Amp your conversations may still benefit from the use of one)
	
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