Wireless RF Products with a wireless router?

Im wondering - I currently have a wireless router set up at my place, and the box says its 2.4GHZ.

Now, I am planning on buying a wireless RF keyboard that says its connecting on the "2.4GHZ ISM" radio band frequency.

Now is this going to affect my wireless net speed? Will it cause the connection to drop?

I need a wireless keyboard WITH a built in trackball or touchpad - and so far, the only ones I can find are RF ones, I havent found one with bluetooth yet.

Thanks!