On Aruba the standard voltage is 127 V and the frequency is 60 Hz. You can use your electric appliances on Aruba, if the standard voltage in your country is in between 110 – 127 V (as is in the US, Canada and most South American countries). Be careful if you bring appliances from Japan (100 V).
If the standard voltage in your country is in the range of 220 – 240 V (as is in the UK, Europe, Asia, Africa and Australia), you need a voltage converter on Aruba. You can also consider a combined power plug adapter/voltage converter.