This is one of the finest EVFs I've ever used. It's also one of the best integrated into the camera. Gets power, signal and sends back controls (it has a number of assignable buttons) through the VIDEO port on the camera that's used for the LCD screen.

I have the one in the photos which is in excellent-to-mint condition and includes the eyecup, BlueStar microfiber pad (I think I have a spare) and the entire Canon stock mounting apparatus that comes with it (unused, sitting in the box in my basement right now. I'll also include the BrightTangerine AXL EVF mount that I used with this, the adapter for the EVF-V70 and the adapter for the LM-V2 LCD screen (C300-3 and C500-2) so you can very very quickly swap between the EVF and the stock LCD screen.

In addition, because Canon doesn't repair these I bought a second one that's in much less minty shape that I used to repair an issue with the diopter lens in the minty one. That one's OLED and other stuff works just fine... it's just a little beat up... and the diopter lens has an abberation in it that makes the image blurry either in the center or at the edges depending on how you focus it. I kept this one around in case there were further issues with the one I use because Canon's only option when I sent it in for repair was replacing the entire EVF unit with another one at a price that was like $1000 more than just buying a whole new one from B&H. Consider it a free bonus from me to you.