The USB Adapter transfers information between a PC and Jeti model products. It is, in fact, an adaptation means between the PC USB interface and the data connector Ext. with appropriate USB support, provided in Jeti model products. All types of equipment marked with the label symbol USBa are prepared for firmware updates. On the internet pages www.jetimodel.com you may find information about actual firmware versions.
Drivers for Windows systems can be found here: www.ftdichip.com/Drivers/D2XX.htm