Built-in with 4 different plug standards which work worldwide, accepts plugs from more 150 countries with US/EU/UK/AU. The luminous logo helps to identify if the adapter is ready to be used and also works as a night lamp. Designed with double ports, allow you to plug-in two electrical devices connectors at once, it just converts the power outlet plug type only, cann't convert voltage. Please make sure your device carries a electrical converter when you travel to other countries with different electrical output.