Anker Eufy Entry Sensor
-2-Year Battery Life: One battery provides monitoring for 730 days.\n-For Doors and Windows: Small and compact design fits onto any door or window frame.\n-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.\n-Easy Installation: Just peel off the mounting tape and stick the sensor onto the door or window you want to monitor.