The remote has been updated to MDB1.3 version. The only way to tell is the sticker in the battery department. This remote uses three digit codes for operating ancillary equipment. The link for these codes is
http://www.humaxdigital.com/global/support/rcucode/adb1.0/rcucodelist_adb1.0_gb.pdf.
However I find the codes in the manual do not work with my equipment. I had to try different code options until they burst into life. Humax supplied no information to differentiate this unit from previously supplied units apart from the sticker inside the battery box.