its the same as the sonic shaped one that I have and yes there garbage.
the games sounds is off period and sounds like non of my originals the speeds are off there just goofy and wonky.
they dont hold over a low amount on the sd before the console is confused and reads non becuase it is over 30 or so in one folder type thing.
original hardware or pc emu the rest are all silly IMHO and I have tried various ones and there all bad news IMHO lol.
Maybe you ended up with one of the earlier versions?
A friend of mine did reviews on a number of AtGames (the manufacturer) and he gave me all of his review stuff including some atari flashback stuff. The genesis clone he gave me has very accurate emulation when it comes to speed and visuals.
I was actually making a tiny bartop using a 5 or 7 inch screen and was looking for one of the sonic branded units but the newer sonic shaped models have removed the SD card slot and wired controllers. When i couldn't find one of the older models i just scrapped my plans. My idea was to make a dedicated streets of rage bartop.

Thanks for the info guys. I guess I'll pass for now unless I can find a really good sale on them.
Yeah, unfortunately for $40 dollars it is a real hard pill to swallow. You can probably look around your local thrift shops and craigslist for a real console and a handful of games for that much. However, you won't ever find some of the games on this list. Golden Axe 3 was never released in North America in cartridge form, only through the Sega Channel. Streets of Rage 3 was panned to the point where very few were made. It's quite a collectible in cart form these days.
I have a soft spot for the portable version. it's just as good as the console one and the sound is passable for me considering its a portable. It also has an SD card slot for loading your own roms. Best of all, the portable unit has legally licensed capcom games including Mega Man: The Wily Wars, Street Fighter Special Champion Edition and Super Street Fighter.