ring Alarms Wireless alarm system extension 626806 - ring 4SP1SZ-0EU0, The Ring Alarm Motion Detector (2nd Gen) is a wireless alarm system extension designed by Ring. It features motion detection capabilities to enhance home security. Typically used for home protection, it allows for quick alerts in case of any movement detection. Ring 4SP1SZ-0EU0 Alarm Motion Detector 2nd Gen: Wireless Pet Safe Easy Setup