The doorbell works in scenarios with or without existing doorbell wires.
If your house does not have existing doorbell wires, the doorbell gets power from its battery.
Note: The battery life varies depending on usage. In most common cases, a doorbell may have up to 10 events per day and each recording lasts 15 seconds on average. Under this scenario, the doorbell battery life can last up to 6 months.
If you have doorbell wires at the front door and don't want to recharge the battery, you can connect the doorbell wires to the doorbell and charge it continuously.
Internet with at least 2Mbps upload speed.
Android 5.1+ or iOS 11+
Note: Video processing requires hardware support. Some old models of phones cannot support HD videos as the chips they use lack the required processing power. However you can put the device in SD mode and it will work correctly.