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DISCONTINUED. (Verified 8/2013) RETAINED IN DATABASE FOR REFERENCE. The Tone Ringer is a telephone signal designed to provide a ring in a special frequency range (750 to 1500 Hz) which can be heard by many people with hearing difficulties. The unit features a 3 volume settings, an off setting, and a modular hookup.
- Blind and Low Vision
- Deaf And Hard of Hearing