Includes One Year Manufacturer's Warranty 

The Geemarc Ampli500 amplified speakerphone boosts up to 50dB amplification. It includes caller ID with large LCD display and a flashing ring strobe, plus a full speakerphone with up to +15dB amplification. 

Standard volume control offers a 30dB gain. When the "AMPLI" button is pressed, the phone provides up to 40dB amplification gain. For additional amplification, the handset boost button provides another 10dB, for a total of up to 50dB gain.