Model No.:RTB6669
Main Features(Reference)

1.FSK/DTMF compatible  
2.38 incoming call and 5 outgoing call memories
3.2 one-touch memories
4.Area code and long-distance code setting
5.8 kinds of ringer tone selectable
6.3 groups of alarm function
7.Real clock date & week display
8.3-step lock function
9.Hold on music
10.Pre-dial, redial, auto redial function
11.Flash time 1000ms/600ms/300ms/110ms selectable
12.5 levels of LCD backlight adjustable
13.Calculator function
14.Blue LCD backlight
15.P/T dialing mode selectable
16.H.F volume adjustable
17.Anti-dialing function
18.Thunder proof design