The Plantronics M12 Vista is easy to use and works with your choice of Plantronics headsets to deliver precise levels of listening and talking comfort, superior protection, and excellent audio performance. Plantronics M12 Vista includes near-universal compatibility with single and multi-line telephones, as well as ergonomically designed Volume, Headset / Handset and Mute controls. The Quick Disconnect between the adapter and the headset allows you to move away from your phone without removing the headset or disconnecting the call. Comes with a lightweight 10-foot coil cord. Retail price $120.00

Key Features:

• Easy to Install and Use. Adapts almost all telephones for use with a variety of Plantronics headset styles.
• Easy to Adjust. Separate controls allow independent adjustment of outgoing and incoming volume.
• Easy One-Button Selection of Headset or Handset.
• Easy to Hear and Be Heard. Call Clarity technology sets a new standard for sound quality.
• Easy on the Ears, Too. SoundGuard Plus delivers automatic sound protection by keeping incoming sounds at comfortable hearing levels.

A Plantronics M12 A/C power adapter is not necessary but is available as an optional accessory, otherwise it uses two AA batteries.

For more details: Datasheet: Plantronics Vista M12 Datasheet. Also see Plantronics M12 Information page