240v? That's easy, they sell dual power cords for kiwis or aussies that come to yankland. it is a forked power cord that terminates in two plugs. You plug each fork into a separate receptacle to double the 120v to get 240v. For reverse, I have not seen in the States, but I assume the sell in Kiwiland, that its half a plug - only one prong, to halve the 240v into 120v. I'd try it if I were you, just cut one prong off a yank receiver's cord and stick into a 240v outlet to get only 120v. I know a friend's brother in law's roomate's sister do it and it worked perfectly.