Famicom in a controller, pretty similar to tons of the other Power Player or Power Joy systems out there.
Cart slot is in the N64 type controller on the bottom where the memory card would go. 2nd player controller daisy chains into the first via a port on the back. Comes with the usual pirate Famicom cart that claims to have 3 billion games but in reality are three billion variations of the same game.
I've got a machine like this and although it's cheaply made it works rather well. Usually you can find these things on Ebay or at the mall for about $19.95