video door phone

1) Dimensions (W x H x D):
    285x225x45mm
2 )Four-wire system                  
3) Power supply: 13V DC
4) Material of outdoor unit:
    Hard ABS
5)Handsfree monitor

DETAILS:

1)4" TFT LCD display                   

2)low power consumption.
3)Intercommunication
4)Electric-controlled unlocking
5)Monitor outdoor.
6)LED lumination compensation
7)16 chord melodies for ring
8)Water-proof, damage-proof, burgla-proof outdoor unit
9)Unique anti-theft design