4-wire analog indoor station:
This indicates that the indoor station operates using a 4-wire connection system. These wires are typically used for power, audio, and video signals. A 4-wire system often provides better quality audio and video transmission compared to simpler systems like 2-wire setups. It allows for more stable and reliable communication between the indoor station and other components of the intercom system.

7-inch TFT screen with 800 × 480 resolution:
The indoor station is equipped with a 7-inch TFT (Thin Film Transistor) screen. TFT screens are known for their high-quality color reproduction and wide viewing angles. The screen has a resolution of 800 × 480 pixels, which ensures sharp and clear images and text. This screen size and resolution provide a comfortable viewing experience, making it suitable for various applications.

Physical buttons design for easier operation:
The indoor station features physical buttons that are designed to make operation easier and more intuitive. These buttons may include functions such as call answering, volume control, menu navigation, and door unlocking. Physical buttons provide tactile feedback, allowing users to operate the device without solely relying on touchscreen controls.

Supports three indoor stations cascading in the intercom system:
This feature allows the indoor station to be part of a larger intercom system where multiple indoor stations can be connected and used simultaneously. Cascading functionality enables communication between different indoor stations within the same system. Users can communicate with each other, make intercom calls, and share audio and video feeds across multiple indoor stations.

Supports remote unlocking, monitoring door station, and external analog camera:
The indoor station can remotely unlock doors, providing convenient access control capabilities. It allows users to monitor the door station, enabling them to see and communicate with visitors at the door. Additionally, it supports monitoring of external analog cameras, extending surveillance capabilities beyond the immediate vicinity of the indoor station.

Supports captured picture storage:
The indoor station can store captured pictures, such as snapshots taken from the door station or external analog camera. These pictures can be useful for identifying visitors, reviewing past events, or monitoring activities around the premises. Captured picture storage adds an additional layer of security and convenience to the intercom system.