1.FSK/DTMF dual system /caller ID function 2.In On-hook stage pre-dial / edit dialing number . 3.50 incoming / 16 outgoing calls memories in 8 digital number. 4.Tone/Pulse Dialing mode selectable. 5.Ringer / speaker volume H/L adjustable 6.Automatically redial / redial / Ring back function. 7.Calendar / time display. 8.16 ringer selectable. 9.No disturb function. 10.Anti thunder protection 11.Steal dialing protection.