I see there is a USB socket on the back of the DS5, what is this for?

This socket serves two purposes – (i) It allows the operator to upgrade the firmware of the DS5 and (ii) it provides the communication link to control the DS5 settings from PC software. The DS5 User interface software can be downloaded from the Downloads tab on the DS5 product page. Do not connect the DS5 to the PC via the USB cable until this software has been installed.