Home Security Wireless Outdoor Driveway Alarm Doorbell 2 Motion Sensor Detector

KERUI M525 Wireless 500ft Long Range Door/Window Open Alarm Doorbell Alarm with 1 M525 Receiver+ 2 D022 Door Sensor. 500 feet far enough to cover every door and window in your house. Each wireless doorbell receiver can pair up to 20 magnetic door alarm sensors and each sensor can add unlimited receivers.

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