I would like to remotely control my off camera flash with my on camera flash. I am not looking for a separate remote unit like packetwizard. I would like the remote built in the flash itself. Canon has the 600EX-RT with a remote in the flash. You can filly control the off camera flash with the on camera Canon flash. Currently Nikon doesn't have a flash like this however I am wondering whether there is any Chinese made flash unit with features similar to the Canon 600EX-RT.