We, COMPETITION CO. LTD., a professional manufacturer of producing video door phone and intercon system for building and villa. 1. Villa system :
a. 4 wires colour vision villa system: We can make one outdoor station connect with 3 colour vision indoor monitors and 1 audio handset. 4 wires connection, with extension call transfering function,using adaptor to supply the power. We also have 4/5/5.6/5.8 inch new TFT display with different design for your refference.

b. 4 wires B/W system:This system can be done : one outdoor station connect with 4 indoor monitor, 4 wires connection ,with extension call transfering function, using adaptor.

c. 4 wires Image function villa system: The indoor monitor can save the image from the outdoor station, one call from outdoor station one picture saved in indoor monitor, it can save 32 pcs B/W pictures at most, and you can check out the memory box from the indoor monitor. This indoor monitor have 4/5/5.6 inch new TFT display with different design for you to choose.
2.Building system:
a. 5 wires in series connection for building system: Simple system connection with 5C cable ,max 28apartments in this system, some outdoor stations can input the name which can also connect two outdoor units.(two entrance)
b. For 8 wires building system: We can make one entrance or several entrances for one building or several building, one outdoor station can connect with many apartments. for example, we have one item named digital transmission outdoor station which can connect max 9999 apartments. The network we can make, which the guard station can be connected with all outdoor stations and indoor monitors together, is much more convinient for communication.
The outdoor station for building can carry out the functions as follows: name input ,access control , password entrance , ect. ... there are aluminium / metal/ plastic material of surface for you to choose....