The GN Twin is a combination NES and Mega Drive/Genesis clone manufactured by Qi Sheng Long & distributed in the US by Yobo Gameware Co., where it is sold for $39.99 and available in both black and silver or silver and grey versions. Its competitors include the Gen-X Dual Station and SG/FC Dual Action.
The console comes with two six-button controllers, but is not compatible with original Mega Drive/Genesis controllers or any accessories for that console (such as the 32X, Mega/Sega CD or Master System converter); neither is it compatible with original NES controllers.
It has a switch to play both Japanese Mega Drive and US Genesis games but unusually Mega Drive games are inserted backwards; it does not have an NTSC/PAL switch so PAL Mega Drive cartridges that perform a region check will not work. It is also not compatible with Famicom cartridges without an adapter as it only has a 72-pin NES port. The Mega Drive side uses a Tec Toy chip, but as with most clones suffers from some sound issues and is not 100% compatible.