Product Quantity: 1set Color: white Smart Life Door SensorWhen you leave your home, you will receive a notification when the door/window opens or closes so you can discover the intruder in time. Intelligent Voice Control: Simply use your voice to control the connected devices. It can also perform automatic control together with other smart devices compatible with Smart Life or IFTTT. Convenient for you to detect your doors, windows, cabinets, drawers or anywhere you want to be notified when opened or closed. Tracking Control and History Recordings: you can share the device for your family members and track the history of sensor activities. Easy to install and Complicate. No complicated installation tools are required. The sensor can be installed in just a few steps with double-sided tape or screws (included).