[Enjoy Your Smart Life] After connecting with the ZigBee Hub, when you leave home, it will push notification message to you when the door/window opens, so you can discover the intruder in time. [APP Remote Control] Download APP "Tuya Smart/Smart Life" to add the device to detect the status of your door/window. Home security in your hand all the time. [Share Control & History Records Tracking] You could share the device to your family members and track the history of sensor activities. [Easy to Install] Simply attach one piece to your door or window, and attach the other piece to the door or window frame with double-sided adhesive tape or screws in just a few steps. [Low Power Consumption] Super low energy consumption, low battery alert. Powered by 2 LR03 batteries, energy-saving and money-saving.