The X902 is a 2.4GHz wireless keyboard. It features 16 function keys and what looks like a D-Pad to the far right of the keyboard to use as a mouse. The reason for the mouse integration is that it was designed for HTPC’s.
The m3 is a portable mouse that runs on the 2.4GHz frequency as well. This mouse also has a feature where it opens up and allows you to stow the USB receiver inside.