Model No.:RTB6650
Main Features(changeable)

1.FSK/DTMF compatible  
2.38 incoming call and 5 outgoing call memories
3.Area code and long-distance code setting
4.8 kinds of ringer tone selectable
5.3 groups of alarm function
6.Real clock date & week display
7.3-step lock function
8.Hold on music
9.Pre-dial, redial, auto redial function
10.Flash time 1000ms/600ms/300ms/110ms selectable
11.5 levels of LCD backlight adjustable
12.Calculator function
13.Blue LCD backlight
14.P/T dialing mode selectable
15.H.F volume adjustable
16.Anti-dialing function
17.Thunder proof design