Manufacturer discontinued in 2010 - a few may still be available (please inquire)
As of January 2012, a few are still available
Adjusts strong and weak calls to a comfortable level
Reduces background noise heard by your caller
Rotary volume control
Headset/handset switch
Locking mute button
Battery compartment and 2 AA batteries included
Includes 2 40287-07 filter cords to use between the handset and amp and between the amp and phone in the very unlikely chance that there is fading in and out on the 84XX, 64XX and 44XX phones (the filter cords will correct that) - and set amp to position 2 on the side
Please call BTP to verify compatibility with your phone at 425-649-9262 or 800-457-4287
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