In the silent mode, the indoor unit only displays the picture, and the default ringtone will be restored after the power is off. Equipped with four infrared night lamps, it can be used normally in no light environment. Outdoor unit with zinc alloy shell and rain cover, with acrylic panel, elegant shape. Support a variety of devices to use, can be used at the same time multi-person online. App remote unlocking can control the door opening at any time, including electric control lock, plug‑in lock, magnetic lock, etc.