High definition 1/3 Colour CCD Pinhole Camera with Metal cover for vandal-proof. 4 Wires in polarity for each apartment. If there are any questions about support or building access control system, feel free to ask me. If there are any problems, feel free to contact me first before opening a case.The item "Kenwei Video Access Control KW-403FC Colour Outdoor Camera for Video Intercoms" is in sale since Thursday, January 7, 2016. This item is in the category "Home & Garden\Home Improvement\Home Security\Door Entry Systems & Intercoms". The seller is "sellelectronics" and is located in Sofia, Sofia-city. This item can be shipped worldwide.