Components: The system includes an outdoor unit (doorbell camera) and an indoor monitor with a 7-inch TFT color digital screen. Features: It offers video intercom functionality, allowing for calls, monitoring, and remote unlocking of electric locks and gates. It also includes motion detection and auto-recording to an SD card. Connectivity: This system supports a 4-wire connection for the indoor unit and can be expanded to include multiple indoor and outdoor units, as well as surveillance cameras. Additional functionalities: It features a hands-free design, adjustable talking volume and melody options, and a perpetual calendar. Installation: It's designed for convenient installation, and some models support the Tuya Smart app for remote monitoring and control.