GN 8000 Multipurpose Amplifer

GN 8000 Multipurpose Amplifer Universal telephone compatibility and top-of-the-line hearing protection. Voice Switching to reduce background noise plus Voice Compression for a consistent, user-friendly volume level. Fingertip access to headset/handset, mute and volume controls. Frequency: NA; Voltage: NA; Power Source(s): NA; For Use With: Universal Telephone Compatibility.