What are the difference between dx20a4h and dx20a4hu / dx20a4p and dx20a4pu?

vbimport

#1

howdy, :cool:

if i will use a internal dh20a4h and dh20a4p for external enclosure which fw do i need?
there are two external fw for each burner.

dh20a4h

external:
-dx20a4h
-dx20a4hu
what are the difference?

and

dh20a4p

external:
-dx20a4p
-dx20a4pu
what are the difference?

http://www.liteonit.eu/de/firmware-und-anderes.html