Model No.:RTB6621

Main Features (changeable)
1.  FSK/DTMF compatible
2.  50 incoming and 15 outgoing call memories
3.  Real LCD week and date display
4.  5 levels of LCD brightness adjustable
5.  Do not disturb function
6.  16 kinds f normal ring adjustable
7.  HF/Ring volume adjustable
8.  Anti-thief function
9.  Flash time 1000ms/600ms/300ms/180ms/120ms/100ms/95ms/90ms selectable
10. 3 group of alarm function
11. Redial function