If the WiFi signal degrades, the picture quality seems to scale in my experience this normally happens when my toddler gets hold of the router antenna, which is a quick fix haha. As far as audio quality, I have never had any issue understanding anyone at the door using this device. Each SkyBell in the app has the ability to control speaker volume in case you find that it is too loud or if you live in close proximity to other neighbors, it is easy to decrease. I was skeptical that the picture was 180 degrees but it really does hit the entire porch from wall to wall, it is amazing the angle this little device captures. As far as night vision, this is some of the best night vision video I have seen, it is in fact in full color and you never have to adjust the camera for day vs night, it just handles it all automatically. Installation/Set upI have installed two of these devices to date, one of my home and now one on a family members home.