Costco has a Ring Alarm Motion Detector, 2-pack, currently $49.99.
https://www.costco.com/ring-alarm-motion-detector,-2-pack.product.100428039.html
Costco has a Ring Alarm Motion Detector, 2-pack, currently $49.99.
https://www.costco.com/ring-alarm-motion-detector,-2-pack.product.100428039.html