H251N - Plantronics SupraPlus Headset - Bendable, Intelligent Click-Stop Boom - Quick Call Twistable Headband - Receive Side Frequency Response - H-Series, or Polaris models for compatibility with Plantronics amplifiers, USB-to-headset adapters, headset-ready phones, and agent consoles - Voice Tube Microphone

** This Product Requires Plantronics M22 Plantronics Universal Amp **