Interesting Megadrive clone from Dynacom, who also made several different famiclone models for the Brazilian market. Clone from Brazil seem to have higher quality standards than average. It looks as if some actual thought was put into the stylings and desgin of the actual console instead of just mass producing any garbage to quickly make a buck.
The controllers for this console have the usual three fire buttons, as well as turbo buttons which are slightly raised (easily visible in the pic above.) Also instead of a cross page they come standard with a small Vectrex-style thumbstick.
From what I understand clones make up the majority of the market in Brazil (many of them actually being the officially sanctioned release of said console) but tend to be somewhat collectable elsewhere. This particular console can be found via various autction sites like Mercado Livre.