all 3 system look and sound like the old school system except a lot smaller and and pre loaded games ,bring back the good old days of playing 8 and 16 bit games without the $1000 s of dollars that original  systems with these games carts will cost 

the atari flash back has about 70 games on it and wireless controllers 

the next 2 are chinese made systems 

the nes entertainment system has 610 games on it comes with 2 controllers but i see only the right port seems to work which is good as 

the last one is a snes lots and lots of games  over 700  and that was complete with the exception of a controller and the nes one works perfect 

i did take screen shots of each system working