1) Touch panel, hand free key (HLX-928HF) 2) FSK / DTMF system and caller ID 3) 100 incoming call number memories 4) 30 dialed number memories and 10 indirect memories 5) Two IP dialing models; long-distance call reply or dialing "0" will automatically dial IP numbers 6) Optional 0 or 9 in long-distance call reply 7) Speakerphone 8) Pre-dialing, auto dialing 9) Music on hold 10) 12-digit calculator 11) Electronic calendar (with lunar calendar); real time, date / time, week display