Elecraft will be closed on Friday, July 3rd in observance of Independence Day
The E850483 cable has been discontinued, it has been replaced by the KXUSB cable. Visit this link to purchase the current KXUSB_a Extra Cable - USB RS232 to 3.5MM Cable
The cable supports a computer connection to the product for use with an Elecraft Utility or to enable Logging and Rig Control Programs.
The E8500483 cable plugs into the common USB port on a computer and creates a virtual COM port, when the appropriate drivers are also installed on the computer.