PS3 Cobra is a PS3 jailbreak dongle which use for enjoy more powerful features on your jailbroekn PS3. More info about the PS3 Cobra USB Dongle, just check here: http://www.dsflashcart.com/ps3-cobra-usb-jailbreak-dongle-p-257.html
You can get older ones even like the pi 3,4 for cheap, but they don't play gamecube, Wii etc very well. Be warned they use a Linux os, which you need to load onto a micro SD card yourself. You can find pre built images like "retro-pie" online free tho which makes it easy to setup.