To extract firmware for Kworld UB499-2T (id 1b80:e409) you need tocopy the following file(s) to this directory. IT9135BDA.sys Dated Mon 22 Mar 201002:20:08 GMT extract using dd dd if=IT9135BDA.sys ibs=1skip=69632 count=5731of=dvb-usb-it9137-01.fwcopytodefault firmware location.