Sorry about that, it seems that the description for that FPV monitor was abit outdated, as its recently been updated to a newer model, but only the images have been changed. The new one although cheaper, does not have any video output ability. I will update the page now to reflect this.
My personal suggestion if you are planning to get goggles is to wait a couple weeks for the new HeadPlay HD goggles that we will soon sell. An FPV monitor will not give the same experience. Monitors are usualy used if you want to do filming with your quadcopter so you can see what your camera is seeing but still look up at your drone easily. But goggles are the best if you want full immersion into the FPV experience.