It comes with Earth and Power wires (about 1 foot in length - but you can join/solder more wire onto them if you need more length its easy as!) and all you need is about a metre or more of vacuum hose (pretty sure its about $8/mtr from autobarn) to reach from the gauge to your inlet manifold (or anywhere else you want to get your vac/boost reading from).
Posted to where?
I'd rather not post it if at all possible. Just being that its a sensitive item and the whole cash on delivery thing etc is a pain.