Serene high definition amplified telephone HDS (Hi-definition sound) technology for unmatched speech clarity Amplifies your out-going voice up to 40dB Makes the softest whisper loud, clear and easily audible Amplifies incoming sound by 18dB Latest DSP (digital sound processing) technology eliminates virtually all distortion, echo effects and unwanted static commonly found in other ordinary amplified phones 9 Easy to use photo-memory buttons for one-touch dialing 95+dB super loud ringer with adjustable ringing volume and tone controls Two (front and side) visual ring flashers that flash when the phone rings Battery back up for power outages (batteries not included) Hearing aid compatible handset SIHD40S
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