Size: Pack of 1- high definition amplified telephone- Hi-definition sound technology for panoramic speech clarity- Power amplifier increases ining sounds up to 20 times louder- Digital speech tone enhancement makes similar sounding words distinct and easy to understand- Speakerphone with adjustable volume for loud and clear hands-free conversations- High-definition sound technology makes even the weakest voice sharp clear and easily audible a new standard in speech amplified telephone technology- 26+dB ining sound amplification- Adjustable digital tone control lets you enhance selectable sound frequencies to match your hearing making difficult to hear words intelligible again- Lates DSP (digital sound processing) technology eliminates virtually all distortion echo effects and unwanted static monly found in other ordinary amplified phones- 9 Easy to use photo-memory buttons for one-touch dialing- Speakerphone with adjustable volume for loud and clear hands-free conversations- Two (front and side) visual ring flashers that flash when the phone rings- Loud ringer with adjustable ringing volume and tone controls- Powered by the telephone line no AC adapter is required- Hearing aid patible handsetSIHD40P