
It does nothing other than very poor quality recordings. It has a knock sensor, but it can't alert you if someone knocks because it doesn't have Wi-Fi or Bluetooth, so what's the point. It also records movements. So what good is a knock sensor or product if it doesn't alert you? You can't even see what's happening outside your door, you have to go home and play bad footage. Be sure to buy a traditional CCTV system or a doorbell system. Don't waste your time with this product

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