Call for help in an instant with a portable button that keeps emergency response at your fingertips. Ring Sensors are built to break free from traditional systems with no need for hubs or the limited reach of WiFi. On Amazon Sidewalk, these devices stay connected for reliable protection day and night.1 Add more devices anytime to expand your coverage as your home security needs grow. | Ring | | Glass Break Sensor (newest model) – Amazon Sidewalk, no hub needed, Pro Monito (sold separately), | White | Best Buy