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clarity 55173000 Super-Loud Telephone RingerDescription: Super-loud telephone ringer 95+dB Adjustable ring volume Adjustable ring tone control 250Hz - 1,200Hz Dual modular phone jacks for easy connection to a standard analog telephoneFeatures of clarity 55173000 Super-Loud Telephone Ringer clarity 55173000 Super-Loud Telephone RingerSpecification o..