LOL, I already have a wireless keyboard & mouse. Most that I'm finding that are cheap only have a range of 6 ft. Mine is right there. The more expensive ones ($80+) have the bluetooth connection with a range of 33 ft. (I've found a couple in the ($50+ price range, but I don't like the layout or the functions) Since I have everything run through a KVM switch, that even makes it more problematic. I'd have to buy a new KVM switch (probably a USB type vs a ps2 type), plus cables for each system and even then, I'm not sure the keyboard or mouse would work properly.
Component video is as good as HDMI. MOST units have a component video out, but I can't say for sure about yours. BTW, that appears to be an adapter for an HDMI cable w/ sound. I could be wrong.