5v/3a suitable?

I have a spare 5v/3a AC adaptor spare from another of my Android boxes that has a UK plug?and wanted to make sure that this would work OK on the firefly without issues.

I have a spare 5v/3a AC adaptor spare from another of my Android boxes that has a UK plug?and wanted to make sure that this would work OK on the firefly without issues.

should be just fine if its a usb adapter or one with the right plug size