Geeni Wi-Fi Door Sensor, Smart Door and Window Sensors, White, 2-Pack No Hub Required – Wireless Design, Instant Alerts… Price: $24.99 (as of 01/10/2022 23:04 PST- Details) & FREE Shipping. Details

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SMART HOME SECURITY SENSORS: The Geeni Door & Window Sensor gives peace of mind, anywhere, anytime. Get real time alerts at the exact moment you have an unexpected guest, opened safe or escaped pet.
NO HUB REQUIRED: This smart home door and window sensor system works with your home Wi-Fi—no hub required! Simply download the Geeni app, mount your sensors with the included adhesive or screws, and connect.