Abstract: A Universal Serial Bus (USB) keyboard-video-mouse (KVM) switch for connection between at least one host and at least one USB device is disclosed. The USB KVM switch includes a first virtual USB hub, a first virtual USB device, a microprocessor and a first multi-address USB device control module. The first virtual USB hub is configured to communicate with a first host. The first virtual USB device is configured to communicate with the first host via the first virtual USB hub, and is provided with endpoint setting data identical with that of a first USB device. The microprocessor is configured to generate the first virtual USB hub, and enumerate the first USB device in response to electrical connection of the first USB device to the USB KVM switch.

Abstract: A method for making a hollow box includes a step of cutting a plate into identification members; a step of sucking the plate to be attached on a fixed area of a female mold by a suction device; a step of squeezing melting and semi-solidified thermo-plastic material and sealing a lower end of the melting and semi-solidified thermo-plastic material, the melting and semi-solidified thermo-plastic material being expanded by the air introduced therein; a step of clamping the melting and semi-solidified thermo-plastic material by a female mold and a male mold; a step of expanding the melting and semi-solidified thermo-plastic material until the melting and semi-solidified thermo-plastic material contacts against insides of the female and male molds; a step of melting the surface of the identification member which is connected to the hollow box; a step of cooling obtaining the product by separating the female and male molds.