Wireless monitor

Can anyone recommend any dirt cheap wireless monitoring options for a 5D Mark II

I dont need amazing image, I just need something so the director can monitor framing. Cheap and wireless are the requisites.
thanks

I regretted writing dirt cheap the moment I clicked post. I would like to try and get something under $850 if possible that exists. just seeing if the option is there if not, I guess i have to go with long wires.

Again the quality of the image for the monitore is not really important for this gig, the Director just needs to guide where im supposed to be pointing to since I dont know the steps of the medical procedures we are shooting.