The system requires a cable connection. A 4-wire connection from the monitor to the doorbell is required . We provide 1m test cable for basic connection, you can extend this distance according to your needs, 80m maximum with easily available cables. WiFi video door phone with TuyaSmart mobile app, use 2.4Ghz wifi network to add monitor to TuyaSmart mobile APP, When someone rings the bell, you will receive a notification from the app on your smartphone, and you can see and talk to the visitor and open the door. Automatic recording. When the visitor presses the doorbell or activates motion detection (motion detection must be set by the APP, the camera will automatically take a photo or video, which is saved to the Micro SD card (not included).Before installing the SD card, restore it to FAT32 format on the computer, it supports 64G max. The Single Family Video Door Phone Kit with internal 7 inch monitor, easy to install touch button; IP65 waterproof outdoor camera with 100º wide viewing angle and night vision, the kit supports connecting all kinds of electronic locks. Up to 4 monitors can be connected to each intercom