The Smartvest Wireless Opening Detector enables you to monitor windows and doors, while its battery operation makes it easy to install, avoiding the need for drilling or wiring. When the battery is low, the Smartvest Wireless Opening Detector sends an automatic notification to the alarm panel about this. The free Smartvest app then guides you step by step through the process of replacing the batteries. In combination with the Smartvest Wireless Socket, you can then initiate certain smart functions such as "open door" or "light on", in addition to monitoring. Compact in size, the Smartvest Wireless Opening Detector is absolutely inconspicuous and blends discreetly into the interior of the room.