FSK/DTMF dual sysytem 42 received incoming call memory(8 digits) 13 outgoing last dialed number 3 kinds of real song ring melody,5kinds of melody ring call back function and ring back 1 auto IP local area code filtrate 4 kinds of key tone selectable Pre-dial and edit dialing number LCD display year month.date and time P/T ,pause ,flash,anti-steal dialing and timing function Hold on music Ringer and speaker volume adjustable 3 group alarm time setting Back light and lock function Voice theincoming number in english OGM function (outgoing transfer number stored)