Amplifies the incoming sound up to 55 dB HDS Hi Definition Sound technology makes every word clear and intelligible, it eliminates virtually all distortion, echo effects and unwanted static noise Digital Tone Settings allow you to selectively enhance the tone of difficult to hear words making them easy to understand again Large and easy to see display with menu in English, French or Spanish Talking Caller ID enunciates the caller's number in English, French or Spanish when a call is coming in Easy to use phone book with incoming call and dialed call logs Back lit talk back keys confirm in English, French or Spanish if you've pressed the desired key correctly Missed call indicator for extra convenience Audio and visual Off hook warning to alert you that you have not hang up your phone properly Six 6 easy to program one touch speed dial buttons Super louder ringer 95 dB with adjustable ringing volume and tone Two bright visual ringer flashers so you will never miss another call again Battery back up for full operation during power outage Output jack for tele coil, neck loop and other assistive accessories Hearing aid compatible handset