Easy to install. 3M double-sided tape (included) can be used to attach the sensor Professional 24/7 monitoring: The smart PIR sensor provides complete monitoring of your home. Use it in a room or anywhere you want to be notified of motion or movement. Capture every activity and send an alert to your Android or Apple phone. It's easy for you to keep an eye on your home security anytime, anywhere Quick Instant Alerts: When triggered, such as human motion or movement, instant notification will be reported to your smartphone within 3-10 seconds depends on internet speed. Built-in redial function allows the PIR sensor to automatically connect to the network after resetting the Wi-Fi router Works with other AIIAT smart products: With AIIAT smart plug and you can create your own scenes such as socket or home appliance can be automatically turned on/off when motion or movement is detected 【Two Modes Switch】: There are two modes for this sensor. 2 and 4 minute mode. The sensor will detect the first movement instantly and then wait 2 or 4 minutes before detecting the next movement. This will prevent false alarms and also save battery life. You can choose what you need Number of shipments: 1pcs (without battery)