This window alarm is made of , which can withstand long-lasting use. Features the ABS material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color: White -Material: ABS -Size: 8.20X4.30X2.00cm/3.22X1.69X0.79in Standby time: 5-6 months Batteries: 2 x AA (not included) Working temperature: 0-40 degree centigrade WiFi type: 2.4GHz 802. / Standby time: 5-6 months Distance: 45m - Support voice control via or check door sensor open/close history on . - Linked with to . By sticking the two parts of the sensor on both sides of the door, window, drawer, etc., you can remotely know their opening and closing status through the mobile phone . - It is widely used and from intrusion. It can be installed in any place with monitoring needs such as residences, shops, , hotels, apartments, etc., to protect the site from intrusion. - Lightweight, portable, easy to install and use, which can give you a great usage experience. - Excellent craft, carefully down to every detail to give it and charming look. Package list: 1 x window sensor