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Plantronics M22 and M12 (older model) headset Amplifier connects Plantronics H series headsets to justabout any single or multi-line “office” type phone and offer ergonomically designed volume, headset/handset, and mute controls. Connects Plantronics headsets to most single or multi-line telephones. We have 23 in stock.Free shipping
· Features:Volume Control,Microphone Mute Button, Detachable Cable, Microphone, Noise Cancellation