1. [APP Remote Control] Remotely control and deactivate at any time via the mobile app 2. [One-Click Activation] You can set up one-click activation, which is more convenient to use. 3. [Voice Control] Used in combination with and Home, you can check whether doors and windows are open or closed 4. [Sharing Function] Share with family members and control together 5. [Offline Function] When the device is offline, the APP will remind you that the device is offline after 30 minutes. [Low Battery Reminder Function] The product uses 2 AAA batteries (not included). When the battery level is low, the phone will remind you to replace the battery. [Easy to Install] Just attach one part to your door or window and then use double-sided tape to attach the other part to the door or window frame, just a few steps Battery: 2xAAA Battery (not included) Working temperature: -10-50 Wireless network type: 2.4GHZ 802.11b/g Application: Smart Life Tips: The product can be updated continuously. Due to different batches, the actual product may have slight differences or color differences, which does not affect the use. Color: White Material: plastic Package contents: 1 * ZigBee Door Window Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowable measurement error is +/- 1-3 cm.