If it's transformer based then look for a switch "110 - 220". If it's switchmode based then look for what the specifications says like "90 - 250 V AC" etc.
I think A1200's came with switch mode power supplies that are not dual voltage. I don't know what would happen plugging a 240v into 110v, but plugging a switched mode 110v power supply into 240v is only fun for a few seconds.
