Bi directional switching is applicable to more scenarios, with two in one out/one in two out options Two computers share a printer, which eliminates the need for repeated plugging and unplugging when switching printing, effectively protecting native devices and reducing office costs External controller, expanding external controller for easier switching and control Circuit safety protection and printing are more reassuring, using printed circuit boards with embedded capacitors/resistors/diodes and other core components to provide overcurrent/reverse current/short circuit protection, making printing more reassuring Instant file fer for printing, USB 3.0 standard, theoretical fer rate up to 500MB/S. File fer to printer is as efficient as direct connection, making office work more efficient Product Name: USB 3.0 Bidirectional Switch Interface: 3 * USB 3.0 Switching: button switching Input/output: bidirectional shared output Size: 62 x 60 x 14.5mm Colour:As Shown Material:ABS Package Contents: 1 * Printer Sharer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.