Pretty hard to find wireless Brazilian Famicom clone made by Dynavision. Essentially a portable without it's own screen. Has a game genie built in. Connects wirelessly to the TV via RF, you turn to chanel 12 or 13 to sync up and play.
It's a NTSC unit, which is strange, because to my knowledge Brazil is a PAL country (I could be wrong though. I don't know.) Works with American 72 pin NES carts, also has a 2nd player port on the side.
Due to low sales this system is rare today, even in Brazil.