Sensorius EUFY T89000D4

- 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.