Actually we are looking for an appartment audio / video intercom. See the picture for more explainations. It has to be wireless, OR it can be working with 2 or 4 cables, no more then 4 cables. We are actually working on behalf of a very big Belgian electricial company. They need a Video / Audio Door Guard with the following characteristics: - a wireless video door for multiple appartments OR working with 2 or 4 cables - 2 to 10 or more appartments - possible that some appartments have a video screen to answer the door - possible that some appartments have a only audio to answer the door - possible to open 2 to more doors from inside the appartment (for example an outside gate, an entrance door, a garage door. . . ) This product would be used in already existing buildings, not in new ones. It would be used to replace defective door guard in existing buildings Do you have something like that to propose to us and what are your prices and MOQ?