From the Manufacturer:
Big Buttons with Large Characters
The big illuminated keypad with large characters is easy-to-see and easy-to-push. It also has a simple and user-friendly key layout that even the elderly will find comfortable to use.
Three Dedicated Memory Dial Keys on Handset
Memory Dial enables you to dial with a simple operation. It is useful for storing the mobile phone numbers of family members to contact in an emergency or friends you call frequently.
Quick Volume Control
You can use the volume keys and the Amplify key on the side of the handset to easily control the volume without interrupting your conversation. Simply push the Amplify key to boost the volume to aobut 2 times the normal level.
HAC (Hearing Aid Compatibility) Support
This handset is designed to work well with a hearing aid.
The call block feature blocks the ringing from phone calls if the entire registered number (1 - 24 digits) is found starting at the beginning of the phone number. The feature helps to reduce unwanted calls such as toll-free calls, and helps to keep your personal time from being interrupted.
By activating Zero Emit Mode, the unit completely stops radio wave transmission while the unit is in standby mode.