2.4G Wireless Video Doorbell with Smartphone Intercom, 256GB

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About device connection methods: This product cannot be connected to the Internet, cannot install software, and cannot be connected to a mobile phone.About device connection methods: This product cannot be connected to the Internet, cannot install software, and cannot be connected to a mobile phone.About device connection methods: This product cannot be connected to the Internet, cannot install software, and cannot be connected to a mobile phone. Doorbell receiving distance: In general environment, the video signal is effective within 100 meters.Doorbell receiving distance: In general environment, the video signal is effective within 100 meters.Doorbell receiving distance: In general environment, the video signal is effective within 100 meters.Doorbell receiving distance: In general environment, the video signal is effective within 100 meters.Doorbell receiving distance: In general environment, the video signal is effective within 100 meters. Standby time:Display: Built-in 400 mAh battery, mainly used for memorizing and saving time.Standby time:Display: Built-in 400 mAh battery, mainly used for memorizing and saving time.Standby time:Display: Built-in 400 mAh battery, mainly used for memorizing and saving time.Standby time:Display: Built-in 400 mAh battery, mainly used for memorizing and saving time.Standby time:Display: Built-in 400 mAh battery, mainly used for memorizing and saving time. Doorbell:The doorbell intercom is transmitted wirelessly, not through shielded wires, so it will be interfered by electrosignals.Doorbell: The doorbell intercom is transmitted wirelessly, not through shielded wires, so it will be interfered by electrosignals.Doorbell:The doorbell intercom is transmitted wirelessly, not through shielded wires, so it will be interfered by electrosignals. Before installation, first test whether the connection signal between the doorbell and the host at the installation location is good.Before installation, first test whether the connection signal between the doorbell and the host at the installation location is good.Before installation, first test whether the connection signal between the doorbell and the host at the installation location is good.Before installation, first test whether the connection signal between the doorbell and the host at the installation location is good. Returns, Refunds and Replacements Delivery Timeframe Delivery is approximately 5-10 business days (excluding weekends and public holidays).