Sonoff SNZB-04 Zigbee Door / Window sensor

The Sonoff SNZB-04 is a Zigbee wireless door/window sensor that can send you push notifications when a door or window is opened or closed, providing an extra layer of security for your home. It’s part of the SONOFF ZigBee-WiFi product ecosystem and can be linked with other devices to create smart scenes, such as turning on lights when a door is opened.