Lidl have an [broken link removed] at the moment. Alternatively, for a few quid more, [broken link removed] will also pop out and make tea/rub your feet, etc.
I presume you're talking about the remote control, not the Robo-thingy?
The instruction leaflet that comes with it will lists of codes for all the various makes of TVs/DVDs/stereos/satellite boxes etc., and instructions on how to programme the control to work each device. If they're like the ones I bought a while back, there'll also be a little writeable-on sticker inside the battery compartment to allow you to make a note of each of these, to save you looking them up again — because if you remove the batteries the RC will 'forget' them.
Tbh, for €8 it would nearly be worth buying two — for when one disappears down the back of the sofa or is otherwise [broken link removed]...