Venu 7 dont have Bluetooth. but if you put a dongle Bluetooth, i think have to work.
I don't have bluetooth dongle, but I have tried with RJ45 dongle, and this one is not recognized by the venus (and im sure the dongle works has I use it with an other ainol tablet (with 4.0.4 android)
it's strange that the menu parameters, network, doesn't have ethernet entry, even if you choose 'more' you juste obtain vpn, mobile or other options but nothing about ethernet.
perhaps there is a file with à commentary that makes ethernet not recognized ... i don't know