The Plantronics M12 Vista Universal Amplifier connects Plantronics headsets to just about any modular single or multi-line phone and offer ergonomically designed volume, headset/handset, and mute controls. Connects Plantronics headsets to most single or multi-line telephones.
Plantronics H91N Features:
- Receive and transmit volume control.
- Headset/Handset selector.
- Connects to most single or multi-line phones.
