3 chord sing originally
16 music ringers and 4chord ringers
4 music key tones ,wire tap SPI,IDDlock
20 chord music hold
Chord music beat color lamp of incoming telegram
predial numbers ,off-hook ,incoming backlight
30 groups 12digits incoming numbers
9 groups 12 digits outgoing numbers
3groups alarms clock function
IP swift, keep secret dialing
8 digits calculator function
FSK/DTMF compatible
Super against thunder, anti-EMI
Voice talking CID ,transfer function