The M12E Vista Amplifier is compatible with the majority of business telephones and features Plantronics Call Clarity and SoundGuard Plus technologies which enhance the quality of the call and ensures that what the user hears is kept at a comfortable level.

The Vista M12E Amplifier has a headset/handset switch, full volume controls and mute button. Unlike the standard M12, the M12E has a switch on the side which switches the wire configurations thereby making it compatible with different phones. Only used on non-standard wire configurations.