Here is a system amazingly simple to implement. The kit is supplied with 2 modules, 2 batteries and transformers. We unpacked, the batteries are placed, we test the function "call" and it works !!!! The outer casing is pretty well finished and looks sturdy. It is equipped with call button and camera. It has an output "dry contact" that sends the order to an automated opening mechanism of any kind to buy open a portal from the module inside the house . Warning: you can not directly control an electric lock of a door for example. And it should be noted that there is only one possible contact, therefore the choice of a pedestrian opening or an opening big. This case is equipped with a battery which can be handy for that can not bring electricity. But be careful to autonomy in that case. The sound quality is good on one side or the other. Infrared image function for night works fine. By cons I have not found very convincing picture quality even in daylight.
Regarding the internal housing is, like that of outside equipped with a battery. There is much more useful because you can travel with our housing in the house and give it to load from time to time. It has a small foot in order to ask him standing on furniture. Otherwise you can choose to attach it to remain on a wall.
Last but not least, the transmission range !! There ,, I have been testing only on battery: interior box in the house and the other in the hand outside chatting live and m''éloignant. Well with two walls between the two devices I could get away from fifteen meters between the two devices before that we are cut off. Perhaps the problem would be different with an electrical connection ?? But I think it should not be assumed to operate this unit with several dozen meters between the two most one or two walls. Anyway do not expect to get 175 m of transmission between the interior and exterior of a building.
