https://www.theguardian.com/technology/2019/dec/12/ring-alarm-review-amazon-diy-wireless-home-security-system

DIY wireless home security system is a great alarm that’s smart enough without trying to do too much

Amazon’s new Ring Alarm smartens up the traditional home security system without radically changing how it works, combining the best of both worlds into a DIY-friendly wireless alarm arrangement that just works.