Yep. They come in pairs. Get the 603NII, the Nikon version, yellow box on right. That way, you can use it on your hot shoe. The Canon version won't line up with Pentax hot shoe pins, at least it doesn't on K5 and K5IIs bodies. The PC cable that came with your Bee will work.
Yongnuo RF-603N II Wireless Flash Trigger Kit RF-603II N3 B&H
So 560TX in hot shoe and 603N II attached to Bee sync port with PC cable or you can also fire the bee optically if you're firing a YN 560II it can see the flash from. I often have have Moms triggering my Bees with their pop-up & smart phone flashes in a open studio.
You can also put the 603N II on your hot shoe and piggy back any existing triggers on it's hot shoe while remotely controlling any YN 560 III power & zoom with the 560 TX hand held. I've done that were I had two set-ups, one with a pair of Bees & and YN560III and the other with an Einstein and pair or YN560III's. 603N II in hot shoe and NPT-04 on top firing Bees.
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