- High-Definition Sound Technology for unmatched clarity a new standard in amplified telephone technology- Amplifies ining sound up to 20 times (over 26+dB) the most powerful in its class- Selectable Digital Tone Setting allows you to boost and enhance the speech frequencies you can"t hear well making difficult to hear words intelligible again- Latest Digital Sound Processing technology eliminates virtually all distortion echo effects and unwanted static monly found in other amplified phones- 9 large and easy to set up photo memory buttons for quick one touch dialing- Two (front and side) visual ring flashers- 90+dB super loud ringer with adjustable ringing volume and tone controls- Powered by the telephone line no AC adapter is required- 3.5 mm jack for neck-loop tele-coil and other assistive accessories- Hearing aid patible handsetSIHD30P