I bought 5 of these. Easy to install and setup. No false alarms. The Model number T8420 doesn’t do human detection but there is a model T8420X that does. I 3 out of 5 of the cameras I bought that have the X at the end. They setup differently, have different firmware numbers (completely different) and slightly different menu features. On the Eufy website they do not differentiate between these two models and the local Eufy rep had no idea what I was talking about. In the end, they work and work well.