Sonic Alert TR100 Amplified Phone Ringer

by Sonic Alert Built-in telephone cord plugs into an empty phone jack or dual adapter (not included) For use with analog, home phone lines, will not work on digital, office, phone systems Does not transmit to remote receivers Tone control ranges from 200-2,000 Hertz Audio alarm volume adjustable from 78-85 dB at a low frequency up to 113 dB at a high frequency 4.5" x 3" x 1.5" Five year warranty For more information, click here to read the User Manual (PDF format)

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