Good build quality, couldn't connect to the lock though, but I didn't bother with that because there was a switch ready. The only negative thing is that the adapter cable is 1 meter long, which means it needs to be close to a socket or the electrician can cut and extend the cable. Very good camera, very powerful sound (I don't think it adjusts in volume), good microphone. It's worth the money. Finally, installation is easy. I recommend it. Time will tell