TRAVELON DUAL USB CHARGER/ADAPTOR - Power up in over 150 countries. - Includes 2 USB charging ports. - Use with voltage converters, transformer and dual voltage appliances. - Built-in surge protection. - Rating to 800W/2.1 amp; charger works on 110V or 220V AC to charge mobile electronics. - 2.25" x 2.25" x 1.75".