Check the listing for details. GN Netcom Universal Amplifier Bundle With Monaural Noice Canceling Headset ADPI. Condition: Used. Listed at 26.99 USD. Introducing the world's first multipurpose, multi-brand amplifier: the GN 8000-MPA. The GN 8000-MPA not only works with just about any phone with a modular connector, it's also the only amp that can be used with GN Netcom, UNEX and ACS brand headsets! Everything about the GN 8000-MPA showcases GN Netcom's technology leadership. With advanced features like Voice Switching to reduce background noise. Voice Compression for a consistent, user-friendly volume level and top-of-the-line hearing protection. Our exclusive, user-selectable battery-save feature. Plus an efficiency-enhancing online indicator option that conveniently doubles as a headset stand. Yet for all these advances, the GN 8000-MPA is easy to set up and use. No matter what kind of headset you use, GN Netcom, UNEX or ACS! • One Amplifier for Multiple Headset Brands • Universal Telephone Compatibility • Advanced Hearing Protection • Headset/Handset Switch • Sliding Volume Control and Click Less Mute Switch