Model No.:RTB6620
Main Features (Reference)

1.  FSK/DTMF system compatible with auto-detection
2.  Voice number and OGM talking in English/Arabic selectable
3.  Real LCD clock display
4.  5 groups AZAN and 3 groups of alarm clock setting
5.  20 incoming, 13 outgoing and 20 VIP number memories
6.  16 kinds of chord music and 1 real song
7.  4 kinds of key tone selectable
8.  Remote checking missed call and remote monitor function
9.  Do not distrub function
10. 3-step key lock
11. 5-digit local code filtrate
12. 5-digit long distace code and 1-digit PABX code setting
13. Pre-dialing and edit function
14. Pause function
15. Flash time 1000ms/600ms/300ms/270ms/180ms/120ms/90ms selectable
16. Baby call function
17. Calculator function
18. Redial and auto-redial function
19. Hands-free dialing and speaking function
20. 2 levels handsfree volume selectable
21. Ringing Volume HI/LO selectable
22. Thunder proof function
23. Pulse/Tone dialing mode compatible
24. LCD backlight function