- Amplifies incoming voices up to 170 times (45+ dB) so you hear every word with unmatched clarity
- Selectable digital tone enhancement allows you to boost and enrich the speech fequencies you can't hear well making difficult to hear words intelligible again
- Automatic gain control optimizes sound level for superior listening comfort
- Easy headset/handset selection button for extra convenience
- Latest digital sound processing technology eliminates virtually all distortion echo effects and unwanted static commonly found in other ordinary amplifiers
- Works with virtually all business telephones and headsets; it connects between phone's handset/headset and base
- AC adapter included battery (9V) optional