This expansion solution is designed for easy installation in servers, industrial control equipment, and other scenarios that require multiple USB interfaces. It can simultaneously expand the USB2.0 and the card reader module on the front of the chassis. Design and mounting: features a strong foot pad adsorption design that firmly attaches to the bottom of the chassis and is reusable for repeated installations. Flexible expansion: converts a single USB2.0 9pin header into two 9pin interfaces, enabling simultaneous connection of the chassis front USB, card reader, or lowspeed peripherals to meet multiple device access needs. Interference resistance and independent power: uses amplification chips and filtering capacitors to reduce interference. with double channel independently powered, it reduces data transmission crosstalk and helps ensure stable operation of peripherals such as keyboards and USB drives, delivering fast speed and full speed performances. Compatibility and performance: supports expanding front panel USB2.0 and card reader modules via a single USB2.0 9pin header to two 9pin interfaces, enabling reliable access to multiple devices on the front panel. Use scenarios: In a server rack or data center, provide front panel USB access and a card reader for convenient maintenance and secure access. In industrial control systems, enable operators to connect USB peripherals and card readers at the front panel for workflow efficiency and device management. On desktop workstations or workbenches, expand front USB ports and card reader access for keyboards, USB drives, and other lowspeed peripherals without occupying additional motherboard headers.