Please note that activation is required before use and there is no need to refresh the firmware, as the latest version is already installed. Upon receipt, only activation is needed. This product is Kmbox B+ version, designed for dual computer setups. The B+ version operates in standalone mode, where computer B (control computer) runs the software and controls computer A (controlled terminal) without requiring any software on computer A. The serial port on device B+ connects to computer A, similar to the standard B version. The B+ version is an upgraded model of the Kmbox B, with key improvements including the separation of the communication serial port from the keyboard and mouse connections. This allows seamless dual computer control: USB1 connects to computer A, USB2 to control computer B, and USB3/4 to keyboard and mouse devices. This setup enables computer B to control computer A effectively. Usage and compatibility are consistent with the original Kmbox series. For dual computer operations, the B+ version is recommended. To use, connect the serial port to computer A and install the CH341 serial port driver on computer B, either manually or via automatic installation wizard. Type: With LCD Color: Transparent Material: Plastic Cable and controller colors may vary and are assigned randomly; specific requests cannot be accommodated, though internal functionality remains unaffected. Package Contents: 1 x Controller 2 x Cables Note: Light reflection and differences in display screens may cause slight variations between the product color in images and the actual item. Measurement may vary by +/- 1-3 cm.