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World's Loudest Telephone Amplifier
Amplifies incoming calls up to 40dB
Tone selector amplifies specific frequencies for optimum speech clarity
Boost button maximizes amplification and blocks out feedback and background noise
Connects easily between handset cord and phone base
Compatible with most home and office phones
Operates on one 9-volt battery (included)
One-year manufacturer's warranty
NOTE: Not compatible with Trimline, Princess style or cordless phones where dial key pad is in handset |
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