• Universal Handset And Headset Amplifier
• 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
• Brand: Serene Innovations