eufy Security Entry Sensor V2 (Addon) LimitedStock and expandability of up to

and expandability of up to 6 handsets

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" holding the top spot on the chart for an unprecedented and unmatched 114 days

eufy Security Entry Sensor V2 (Addon) LimitedStock and expandability of up toOverview 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 powerful siren will go off on the HomeBase (can be disabled). Requires eufy Security HomeBase. Easy Installation Just peel off the mounting tape and stick or screw the sensor onto the door or window you want to monitor. 2 Year Battery Life One CR 123A battery provides