Universal Business Phone Handset/Headset Amplifier - Model UA-50

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. UA-50 User Guide - Norway