Brinno Knocking Sensor
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The Brinno Knocking Sensor lets you know who was knocking on your door even when you aren’t home
The Brinno Knocking Sensor is an optional accessory for PeepHole Viewer (PHV1330).
When the Knocking Sensor(KNS100) detects the vibration from your door, it will wake up PeepHole Viewer (PHV1330) to record images automatically even if you are not at home.