The Siemens HMI (Human Machine Interface) model number you mentioned is 6AV6671-1CB00-0AX2. This HMI is part of the Siemens SIMATIC HMI Basic Panels series. It is a compact, entry-level operator panel that allows users to interact with and control automation processes.

The 6AV6671-1CB00-0AX2 HMI features a 5.7-inch TFT display with a resolution of 320x240 pixels. It has a monochrome screen and offers a keypad input for operation. The panel is equipped with an Ethernet interface for communication with other devices in the automation system.

With the HMI, you can develop and deploy user-friendly interfaces for controlling and monitoring applications in various industries. It supports the integration of alarms, trend displays, recipe management, and user authentication. It can also be configured and programmed using Siemens' WinCC Basic software.

Overall, the 6AV6671-1CB00-0AX2 HMI is a cost-effective solution for small to medium-sized applications that require a basic operator panel for visualization and control.