The MX4000 Type 7870 is European version except UK & Ireland which is 7872
The differenent type numbers for all B&O products normally reflect country or regional differences. For example the UK has different power plugs to most European countries, so that alone would require a different type number. Also in the case of Beovisions, in the UK we use PAL I, but in most of Europe, they use PAL B/G
Take for example, the Beo5, there is only ONE type number for all countries because it is exactly the same in every way, however the charger which is sold seperately has different type numbers to reflect the different power plugs and voltages.
On the other hand a product like the Beocom 6000 handset you would think would be like the Beo5 and only have one type number, but this is NOT the case because the Beocom 6000 comes with the different country languages.