We've been pretty happy with Wyze cameras. They're inexpensive, and easy to set up. I think the cameras were about $25 each. The cost was low enough for us to just try them out, now we have about four of them, plus the controllable plugs (great for Christmas tree) and a few of their LED light bulbs. We can view any of the cameras remotely, they notify if sound or movement is detected, and we can talk through the camera, but I suppose they all have these features.