Colour:White Material:ABS Note the features: 1. [APP remote control] Remotely set the arm and disarm at any time through the mobile phone APP 2. [One-click arming] You can set one-click arming, which is more convenient to use. 3. [Voice control] Used with Amazon Alexa and Google Home, you can check whether the 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 the device to be offline after 30 minutes 6. [Low battery reminder function] The product uses 2 AAA batteries (not included). When the battery is low, the phone will remind you to replace the battery [Product parameters]: 1. Battery: 2 x AAA Battery(not included) 2. Working temperature: -10℃-50℃ 3. Wireless network type: 2.4GHZ 802.11b/g/n 4. Application: smart life 5. Product size: 70x20x25mm Package Contents: 2 x Smart Magnetic Door 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.