DTMF multi-system compatibility, FSK message auto-adjust real time of the unit, LCD displays incoming number / date / time / serial number / total incoming calls, new call / repeat call / private / out of area / error indication, record 40 incoming and 10 outgoing calls, auto-filter local area code and auto-add “0” before IDD number, pre-dial function, edit and delete the number, electronic calendar, conversation auto-timer, full hands-free dialing and conversation, hands free volume adjustable, pulse and tone compatible and one key redial function, hold on music, steal-dialing alarm, anti-EMI, thunderproof design, 2-step lock, lock “0” and unlock, ringtone selection.