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Q:How does the device store video? A:The Video Doorbell maximum supports 32G external memory card, which will automatically cover the earliest video when it is full Q:How to check the offline of the device? A:Check whether the device electricity is exhausted Reconfigure the device Check if the home network broadband is normal Q:Why do people linger ,but the doorbell did not push the alarm? A:The doorbell wonât detect the lingering and push alarms when the owner remotely login the doorbell