The following speakers are designed with North American Voltage 120V:
AR302-BK
AR306-BK
AR504LR-BK
AR506-BK
AR508LR-BK
AR604H-BR
ARDS100-BK
The following speakers are designed with Universal Voltage 120V~240V:
ARDS300-BK
ARDS550-BK
ARDS750-BK
To use speakers designed for North American Voltage 120V, in geographic regions operating at 240V, you will need to use a voltage converter.
To use these speakers outside of the US market, you will need socket adapters to accommodate for the different socket shapes of each country.