The Casio Phonemate is cordless amplifier telephone designed for use by individuals who are hard of hearing. This phone features a hearing-aid compatible handset, a built-in amplifier that amplifies incoming calls up to 16 decibels (dB), a flashing LED to alert the user to incoming calls, caller identification (ID) with name and number display, caller ID call waiting display, speakerphone capability, two-line capacity, display and dial telephone numbers, and a 20-station autodialer. This phone also features 25 channels with auto channel selection. POWER: The handset is battery-powered (battery included) and offers 7-day standby power. A charger base is included. WARRANTY: One year.