Video Door Phone

Features:
1) Ring bell: two chime melody rings optional, but one door station can only
have one ring
2) Call function: dual conversation is available
3) Call between monitors is available
4) Extension: one or two door stations support four indoor phones at most
5) Door release function: signal unlocking
6) Provides a constantly clear and bright picture on the screen at any light level
from 0.1 Lux (at night or in dark places)
7) Color (4" or 5" or 5.6" TFT ) or B/W display optional
8) Dimensions:
a) Door station (CM-06Nd2): 206 x 126 x 42mm
b) Indoor phone (CM-06NRaI): 235 x 200 x 48mm