1. is the wlan controller included? 2. if you have several cameras outside around the house and the receiver is in the house, how is the coverage, i.e. does it go through walls well and how far away can the cameras be? My wifi did not cover the whole house, I had to install additional APs. 3) The receiver is certainly connected to the network by cable, is wifi also possible? 4. why is the receiver needed at all? is the recording stored there (SD card)?