The Word's Loudest Telephone Amplifier, ideal for the hard of hearing.
This telephone amplifier features: Amplifies incoming call up to 100 times normal volume (+40 dB). Boost button maximizes amplification while blocking out feedback and background noise. This amplifier has a tone selector, which amplifies specific frequencies for optimum speech clarity and distinction between similar sounding words like chair and share. Compatible with most home and office telephones, this easy to use amplifier makes hearing impairment less of a hassle. Connects easily between handset and phone base, no wiring involved. Compact and portable, take it with you everywhere. 9V Battery included. Please Note: This unit will NOT work for cordless telephones