1. APP remote control: remotely set up and disarm at any time through the mobile phone APP. 2. One-click arming: you can set up one-click arming, which is more convenient to use. 3. Voice control: work with and Home to check whether and are open or closed. 4. Sharing function: share with family members and control together. 5. Offline function: when the device is offline, the APP remind the device to be offline after 30 minutes Low battery reminder function: the product uses 2 AAA batteries (not included), when the battery is low, the phone remind you to replace the battery Battery:2xAAA batteries (not included) Operating temperature: -10-50 Wireless network type: 2.4GHZ 802.11b/g Application: Smart life Due to different batches, there may be differences in product appearance and printed text, which not affect use. Colour:White Material:ABS Package Contents: 1 * Door Window Sensor Kit 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.