Cordless telephone for expansion of various Panasonic telephone systems - Panasonic KX-TGA681EXA. Features: GAP compatible, lighted display with 4.57 cm (1.8"), lighted keypad, smart key with flashing indicator and quick access for incoming/missed calls, night mode with timed ring off on handset, alarm clock with weekday setting and snooze function, caller and dial block, handsfree function, call time of 15 hours, standby time of 170 hours, 30 polyphonic ring melodies, and 10 ring tones.