Hi Barend,
Take a look at the klik aan klik uit site and see the Lightmanager Mini/Pro on this page
[Link: klikaanklikuit.nl]They are controlled by your Pronto (IR) and as long as you are in line of sight of that it will then control RF actuators around the house. The pro model can also hold timers etc
See the original producers website here (JBMedia)
[Link: cms.jbmedia.de]It has an explanation of what is possible. I use one with my Bang & Olufsen IR remote and it is excellent.
It controls a long list of RF including InterTechno series at 433.92 MHz and compatible (e.g. HomeEasy UK, Coco, Nex, Chacon, klik aan klik uit and more) & FS20 series at 868.35 MHz from Conrad Electronic
You might find that more reliable. I control RF all around the house and in my garage and in the garden from this, it is VERY reliable and I do not remember the last time I turned off or on and it did not work!
Regards
Stoobie