performance main control chip provides stable operation and smooth switching, improving work efficiency. Suitable for a variety of devices; two computers can share four USB devices to boost office efficiency. The USB 3.0 design enables two computers to share four printers, making it easy to manage printing needs in both home and office environments. No need to plug and unplug repeatedly when switching printing, which protects equipment and reduces office costs. Use scenario: in a small home office, two PCs share printers and USB peripherals (keyboard, mouse, flash drives) to streamline workflows. Use scenario: in a peer or shared workspace, two computers access four printers and other USB devices, simplifying print management and reducing device clutter. Use scenario: in an educational or IT lab, two computers quickly switch between printers and USB peripherals for testing, training, or demonstrations.