Model No.:RTB6606
Main Features(changeable)

1.  FSK/DTMF compatible
2.  Powder saving function
3.  60 incoming and 20 outgoing call memories
4.  5 levels of LCD brightness adjustable
5.  Anti-thief function
6.  3-step lock
7.  Local area code filtrate
8.  Converstaion timer function
9.  Calendar function
10. Flash time 600ms/300ms/200ms/100ms selectable
11. Hold on music for both lines, 3-way conversation
12. Line 1 is busy, Line 2 could receive the caller id information
13. 16 ringer selectable
14. Auto-redial and back
15. 2 groups 32 digits or 10 groups 16 digits one-touch memory
16. Blue backlight function