Look at the end of the white Kindle adapter plug between the metal spokes, it should say
Input: 100-240V~0.15A 50-60Hz
The US uses 110-120V 60Hz, most of Europe uses 220-240V, 50Hz
So the small black adapter shown is the only additional item needed (for the Kindle charger, be sureto look at the Input voltage of other devices you bought, some may be 110-120V only which will need a voltage converter).
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