FEATURES:  COMPATIBLE DOOR SENSOR: When the door or windows are opened, the receiver will sound an alert and you can receive mobile notifications, you can know someone break-in or your kids, elders, your pets slipped out of the house at any time anywhere, after setting up your notification preferences, keep it simple and let the system do the rest and monitor your home and property for you.     HASSLE-FREE SETUP: Protect your property from the inside-out, and get mobile alerts when doors or windows open and when motion is detected at home, set up your entire system without the need for tools or professional installation, and expand your Alarm to fit any home or apartment, Protect your elders when an emergency occurs, trigger instantly by remote control, remind you when your kids slip out of the door open the window, Keep an eye on your pets when they are back or off the house     PROTECT ALL ASPECTS: Apply in different scenes to make it part of your Smart Home System or Home Protection System, protect your home with open/closed door detection, When the door/window is triggered, you will receive an alarm signal from your phone, Home Security Alarm make House safety.     FULL EXPANDABLE SYSTEM: When a door/window is opened or closed, the sensor will push an instant notification to your smartphone immediately, so you don't have to worry about your baby going out of the house without notice, will easily know when your aged parents leave or arrive home and even can be clear when someone enters your home, shop, office, etc.     SPECIFICATION:  Color: White;  Alarm Type: Apps Control;  Connection Type: wireless; Kit Configuration: Door/Window Sensor;  Product Type: Smart Wi-Fi Door Sensor;  Connect Method: WIFI (802.11b/g/n);  Trigger Distance: 2-3cm;   Working Temperature: -10℃-55℃