The interior has the following dimensions: 21 x 10 x 7 cm
This is the renewed version, which is not affected by the recall. The pictures are for illustration purposes only.
Unfortunately, I couldn't find this information anywhere at the manufacturer's or on the web in general. With a bit of luck, someone else will answer your question :)
Theoretically, any surface. It just has to fit at the back. It would be interesting to know if it can also fit underneath, or if you have to turn everything around.