Plantronics Vista M22 Universal Amplifier Adapter 43596-40 Used Not Tested

Plantronics Vista M22 Universal Modular Amplifier Adapter 43596-40 Used. Not Tested Nice Used Condition H Series Includes Box and User Guide No AC Adapter Included Used 2 AA Batteries Plantronics 43596-40 Pl Amp For H-series : Plantronics Vista M22 universal modular adapter Replacement for the PL M12 Enhanced features over the M12 Modular jack plugs into phone For use with any Plantronic quick disconnect headset Operates on 2 AA batteries (included) or AC adapter(not inc?????? - Plantronics Vista M22 universal modular adapter - Replacement for the PL-M12 - Enhanced features over the M12 - Modular jack plugs into phone - For use with any Plantronic quick dinnect headset - Operates on 2 AA batteries (included) or AC adapter(not included) - Manual scroll volumentrol - Headset on/off switch (switches between headset and telephone handset) - Mute button - C No batteries included No Power Supply