There's an updated datasheet for the RTB out now, I compared it to the last one and there were 2 changes...
Added to compliance section:
"in line with EN 55011 class A, operation in
residential, commercial and business
areas or in small-size companies is not
covered; therefore the instrument may not
be operated in residential, commercial and
business areas or in small-size companies
unless additional measures are taken to
ensure that EN 55011 class B is complied
with."
(...so I guess that means it has the potential to cause interference in excess of that spec.)
UART decode spec changed: max bitrate officially reduced to 3 Mbps.