EUFY SENSOR DOOR/WINDOW ENTRY/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.