It can backup your cartridge to floppys, then can load floppys to play game. It use on NTSC snes only.

It has DSP chip on board.

If you use it on Pal SNES, you need to put Pal CIC chip inside the copier.
Or modify your SNES to bypass lockout protection.

Please notice that it need 9V DC Power supply. (Not included)
(You can use Genesis/SFC/PCE power supply)
Power supply plug, outside is + (positive).

People report that Europe SNES/SFC power supply can not use on copier.
Because it is AC not DC. You must need DC power supply for the copier.

Please use good floppy disk for it. If you use old/dirty floppy disk,
then it will damage copier floppy drive.