The M22 Amplifier and H251UNC Headset make the best corded system for use in loud offices. The M22 Amplifier connects the SupraPlus H251UNC headsets to just about any modular single or multi-line phone.

The system offers easy to use volume, headset/handset, and mute controls.

The SupraPlus H251UNC Headset provides excellent audio quality, like its predecessor the H251N, but provides even more noise-canceling making it an unbeatable combo.