eufy Security , Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase S280 or HomeBase S380

Entry Sensor Protect Your Doors and Windows from Break-Ins with eufy Security Entry Sensor. Once a window or door is ajar by 1.5 inch, an alert will be sent to your smartphone, and a 100-decibel siren will go off on the HomeBase (can be disabled). eufy Security: Less Trouble. More Secure. Ever Expandable. Surveil your home from front to back for total peace of mind Created by the same team as Anker—renowned for exceptional quality and innovation FAQ Is there any battery included in package? Yes, a CR123A Battery is included. Can I use my own router to pair with eufy Security Entry Sensor? No, you can only use eufy Security HomeBase to pair with eufy Security Entry Sensor. Can I use it in outdoor environment? No, it is designed for indoor use only (Not Weatherproof). How can I know if I need to change the battery? There's low battery life notification, which will inform you when the battery level is lower than 10%. How to install the entry sensor? Step 1: Peel off the mounting tape and stick or screw the sensor onto the door or window you want to monitor. Step 2: Stick the magnet part onto the frame of this door or window near the entry sensor's printed ''Magnet'' wording. Note: Please make sure the distance between entry sensor and the magnet is shorter than 1.5in.