From Sega Retro
The Super Senga is a Sega Mega Drive clone console manufactured in South America. Because the console looked so similar to the Japanese Sega Mega Drive, this managed to become one of the more popular Mega Drive clones.
The Super Senga is essentially Sega Mega Drive I with a region switch and a different logo in bottom right hand corner, making it easy to identify. Many people are still accidentally sold these systems today as the differences on the outside are so minor. The system is fully compatible with the Sega Mega CD and shipped with a six button controller.