Product DescriptionThe Geemarc PAMP-40 Inline Amplifier offers simple setup and connection yields enhanced clarity for corded phone conversations with a sound amplifier boost button.
- incoming volume amplified up to 40 dB gain with "boost" volume button
- receiving tone control: Bass -10dB max, Treble -10dB max
- automatically switches ON/OFF by voice detection
- automatic detection of best frequencies band makes it compatible with 99% of modern corded non-amplified phones