This is a fully assembled USB7 ready to be plugged in. You just need a USB A-to-B cable and a wicked idea for it.
The USB7 is a 6 digit LED display, controlled by a USB virtual COM port. The instructions contain far more details.
This kit contains a PCB with mounting holes. These are better suited to being mounted into an enclosure. If you remove the USB connector and connect a cable directly, the display can be flush-mounted.