24/7 monitoring: : The door glass sensor allows you to constantly monitor your home. Use it on doors, windows, cabinets, drawers or anywhere you want to be notified when it is opened or closed. Catch every activity and send an alert to your Android or Apple phone. It is easy for you to monitor the security of your home anytime no matter where the device needs to be used within the signal gate limits of the WiFi router. Easily enjoy the smart lifestyle : : Wide gap performance allows up to 1cm when door / window is closed. No intrusive wires and battery powered, able to be installed in any difficult situation by installing tape or screw (supplied). Monitor critical points in the home, garage, stores or offices, factories, etc. Plus, share the device with your family members and follow the story. Quick instant alerts: Support 2.4G wifi connection. When triggered, such as open, closed or tampered with, an instant notification will be reported to your smart phone within 3 to 10 seconds depending on internet speed. The built-in redial function allows the door sensor to automatically connect to the network after resetting the wifi router. the device must be used within the limits of the WiFi signal. Guarantee: - RoSH, CE certified. 100% premium copper wire. Smart power strip installs with surge and leakage protection switch; supports overload protection, absorbs huge and sudden energy, protects connected equipment from damage. 12-month worry-free warranty and friendly customer service. See more details.