Hear Clearly. Clarity's patented hearing technology, Clarity Power™, makes hearing easy again by: Minimizing background noises Eliminating feedback and distortion Managing soft/loud sounds to produce clarity Amplifying incoming sound up to 40 decibels or 20 times louder than a standard home phone Offering four (4) tone settings to customize your listening experience Utilizing DECT 6.0 technology for clear, interference-free communication