It's input is rated for 110V (found in the U.S.) and up to 240V (most European countries supply electricity at 220V). While the adapter is compatible with the electrical input you will still have to get a simple power plug adapter to change the U.S. style plug to European (or whatever your destination is).
The MacBook charger will work if you use the two prong attachment instead of. You do not need a voltage, frequency, or plug-shape adaptor in Japan with a .
What is the best power convertor you should bring to charge your iPhone with. how to charge your iPhone with a South African power outlet with the Apple USB. Travel Voltage Converter – The BESTEK travel converter has 4 USB charging .