This product has been discontinued


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.

Technical Specifications

Manufacturer Plantronics
Catalog Number 1459
Type Corded
Wearing Style Over-the-Head
Max Range / Cord Length 10 ft.
Weight 1.4 oz.
Compatibility Works with your existing single- or multi-line corded phone
Microphone Noise-canceling
Earpiece Foam
Color Black Headset, Dark Grey Amplifier
Special Technologies Ultra-Noise-Canceling
Warranty 2-Year Full Replacement
Battery Life 6 months if turned off when not in use
Handset Lifter Compatible No
Busy Light Compatible
Quick Disconnect Yes
DC Adapter Compatible Yes
What's in the box? Plantronics Headset; Carrying Pouch; Plantronics Amplifier; Battery Door Kit; 2 AA Batteries; Male Modular to Quick Disconnect Cord; Pigtail Connector Cord from Amp to Phone

Customer Reviews (312)