Setting up a wireless keyboard/mouse - help please!?

Q: Morning folks, I'm setting up a wireless keyboard/mouse combo so that I can surf and game from my armchair (back injury, not just lazy :-)). So far I've got in my shopping basket: Logitech LX710 wireless keyboard/laser mouse, a 5m vga monitor replacement cable to go from PC to TV for vision, a dvi male to vga female cable for audio, and I'm just thinking I probably need something like a USB extension cable because the armchair is about 15ft away from the computer and won't have a direct line of sight. Does anyone know what sort of USB cable I'll need? I'm confused between USB and USB 2.0 and between USB device cable and USB extension cable! The USB ports on the PC (an HP Pavillion, couple of years old) are saying USB 2.0 so I assume I need something that says USB 2.0 but it was the difference between device cable and extension cable that was confusing me. Basically I need something I can plug into one of the USB ports and shove under the sofa or wherever so that the keyboard/mouse can pick up the signal. Any thoughts? Also, for this setup is there anything else I'm missing? I know the graphics card in the PC will support the twin monitors and the tv already has a PC channel ready and waiting but I may be missing something. Any help gratefully received! sorry, ignore the bit about the DVI/VGA cable - it's an adapter for the VGA cable. I have the audio cable already (durr)

A: Just ask for a USB extension cable. There is no difference in the cables 1.1 & 2.0

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