Hey Knob,
I am back from vacation and ready to play !!!
I received the same player as yours ordered from tinydeals ( well i hope it is haha ).
It has a RK2705 and uses two 4GB MLC Flash.
Note the empty room for an unknown chip.
It might be there to make future players based on the same PCB but with touch screen capability ? I don't know
A picture of it :
I have 3 other players based on the 270x.
One of them is touch screen, here is a picture
I don't know the difference between RK2706B and RK2705, it could be that RK2706B has some integrated touch screen controller.
Note, in my players that have FM, there is the nearly exact same FM module based on the CL5767 chip.
Cheers