IMO this product makes a lot more sense without the router/wifi portion. Consumers don’t care how the thing works, it’s beneficial enough for many to have a security system like this.
https://www.amazon.com/Aqara-Positioning-Multi-Person-Detect...
Reviews on the Home Assistant forums are less than glowing. They apparently work well if you can mount them on a wall chest-high, which could present some significant issues aesthetics-wise - and spend some time "tuning" them.