Eufy Security Smart Entry Sensor

Disclaimer: Requires Eufy HomeBase. 2-Year Battery Life: One battery provides monitoring for up to 730 days. Made for doors and windows: Small and compact design conveniently fits into almost any door and window frame. 100dB Siren: If a forced entry is detected, a siren will be triggered on HomeBase (not included), and you'll be notified instantly on your smartphone. Easy to install: Peel-off mounting tape and stick on the surfaces you want to monitor - no accessories, wires or drilling required. What's in the box 1 x Entry Sensor 1 x CR123A Battery 1 x Magnet 3 x Mounting Screws 1 x Owner's Manual