Zigbee Hub Requested ，This door sensor doesn't work alone. It need to work with Zigbee hub。

✅ Required Zigbee Hub: A Zigbee hub is required to use the Zigbee Door Sensor. Please note that the hub is sold separately.(Not all zigbee hub can compatible with the sensor well.)
✅ Smart Home Automation: The Zigbee Door Sensors can automatically control other Zigbee-enabled accessories through routines, such as Google Assistant, Smartthings, or Alexa
✅ Get Notified & Double-check on the Spot: Get immediate app notifications on your smartphone for doors and windows open/closed with Zigbee Door Window Sensors. uses voice commands to see the doors and windows' current open/closed state at a glance, and controls the routines/scenes for peace of mind.
✅ Hassle-free Setup: The Mini-sized Smart Contact Sensor is easy to install anywhere without tools .