2-input 2-output mode allows two computers to share two USB devices. Wireless Bluetooth keyboards and mice are supported, but the dual-input, dual-output mode does not support the simultaneous use of two USB devices.<br> 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.<br> External controller, expanding external controller for easier switching and control.<br> 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.<br> Instant file transfer for printing, USB 3.0 standard, theoretical transfer rate up to 500MB/S. File transfer to printer is as efficient as direct connection, making office work more efficient.<br> Product Name: USB Printer Sharer<br> Switching: button switching<br> Input/output: two in two out<br> Color: Black<br> Material: ABS<br> Package Contents:<br> 1 x USB printer sharing device<br> 1 x controller<br> Only the above package content, other products are not included.<br> 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.