AT&T CL80109 Digital Cordless Expansion Phone DECT 6.0 Accessory Handset with Caller ID is designed for use with AT&T CL Series. Caller ID offers a 50-name/number Caller ID history, display dial, missed call indicator and new call indicator. Wireless network-friendly expansion handset features DECT 6.0 Digital technology, a speakerphone, 50-name/number directory, nine-number speed dial, any key answer, auto off, call transfer using intercom, volume control, ringer volume control, handset locator, large lighted display, lighted keypad, last five-number redial, on-hook dialing, mute function and selectable ringer tones. Conference between an outside line and up to two handsets. Setup menu is in English, Spanish and French. Handset is hearing aid compatible.