Smart Door & Window Sensor — Door Open/Close Detector with 90DB Alarm, Router/App Remote Control

Compact door/window detector that emits a 90dB siren when triggered. Connect the sensor to your router using the mobile APP to enable remote monitoring and control from anywhere, anytime. The app lets you protect/unprotect the system remotely and sends instant push notifications if an alarm occurs. Built-in low battery alert notifies you when power is low. Requires 2 pcs AAA 1.5V batteries (does not include); expected battery life is 3-6 months.