• Amplifies incoming voice up to 45 dB, so you hear every word with unmatched clarity.
• Selectable Digital Tone Enhancement enriches the speech frequencies you can’t hear well, making difficult-to-hear words intelligible.
• Automatic Gain Control optimizes sound level for superior listening comfort.
• Convenient headset/handset selection button lets you easily switch between modes.

• Latest Digital Sound Processing (DSP) technology eliminates most unwanted distortion, echo effects, and static commonly found in ordinary amplifiers.
• Works with virtually all business telephone systems and headsets, connecting between the handset/headset and base.
• Matching headset, Model UA-50HS, available as accessory.
• AC adapter included; backup battery (9V) sold separately.