This wireless video doorbell features a low-power design with a built-in 1000mAh rechargeable battery, offering long battery life and reliable performance. A single charge provides 800-900 rings. The display screen has a built-in battery, but its capacity is only 400mAh, so please ensure the display screen remains connected to a power source. It boasts a 170 ultra-wide-angle view, providing clear visibility in all directions. Please note that this video doorbell does not have an app; the outdoor camera feed cannot be viewed when no one is ringing the doorbell. The display screen must remain connected to a power source. The outdoor doorbell is waterproof: It has an IP65 waterproof rating, with a silicone-lined waterproof cover, easily handling rainy conditions. In open environments, the connection distance reaches 50-80 meters; with obstacles, the connection distance will shorten to 10-30 meters. If the signal is blocked by a solid wall or iron gate, the connection distance and standby time will be reduced due to the need to search for the signal. Multifunctional doorbell: Video recording: Insert an SD card and press the doorbell to automatically record video. Photo taking: No SD card is needed; simply press the doorbell to take a photo. Home Environment: The display screen can be placed at the entrance or in the living room, powered by an external power source; the doorbell can also be installed outdoors. Wireless Doorbell Camera with Display: Features two-way communication; after connecting to the doorbell, you can have a two-way conversation with visitors. Even without a peephole, you can still feel secure knowing who's at your door!