FSK/DTMF dual system; 42 received incoming call memory(8 digits), 13 outgoing last dialed number 3 kinds of real song ring melody , 5 kinds 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; Flash time programmable from 90/120/180/300/600/1000ms Hold on music Ringer and speaker volume adjustable Calculator function 3 groups alarm time setting back light and lock function Voice the incoming number in English OGM function (outgoing transfer number stored)