Compatible with Nintendo Gameboy Color, Gameboy and Gameboy Advance Gameboy Flash Cartridge and GB Pro + this Product includes around 1000+ games and can be used by downloading your Roms, in order to do this the Cartridge comes with a 4GB micro SD card 

this Cartridge is Compatible with 99% of GB and GBC games. Can be used with Gameboy, Gameboy Color and Gameboy Advance.

The cartridge has a save battery so you can save your play in games such as Pokemon, Zelda and more!