Eufy Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life - White

2-YEAR BATTERY LIFE: One battery provides monitoring for 730 days.

FOR DOORS AND WINDOWS: Small and compact design fits onto any door or window frame.

100-DECIBEL SIREN: If a forced entry is detected, a siren as loud as a jackhammer will be triggered on HomeBase, and you’ll be notified instantly on your smartphone.

EASY INSTALLATION: Just peel off the mounting tape and stick the sensor onto the door or window you want to monitor.