1. Worring about the charging problems during international travel? No, don't necessary at all. This converter is the BMW of the charging world. With unique direct US plug and 4 adapters, it is the top choice for international travel, especially for Europe travel. 2. Converter for 110V devices: Patented technology converts voltage in different countries including Australia (100 240V, 50/60Hz) to US/Japan voltage (110V, 60Hz) power converters, ideal for charging various small devices less than 250W. 3. Worldwide Use: 1 US power cable and 4 international adapters (UK/US/AU/ India plug), so you could use American electronics in 220V / 240V countries such as United Kingdom, Continental Europe, Australia, Italy, Japan, China etc, more than 150 countries over the world. 4. Charges 7 devices simultaneously: Supply 250 watts power converter with 3 standard US plugs and four 5V / 2.4A (2.4A per port max) capable of simultaneously charging multiple devices for laptop, bluetooth speaker, CPAP machine, fan, game console, kindle, TV, DVD players, lights, iPad, and other electronic devices outlet adapter. 5. 24 month warranty guaranteed: NRTL tested and upgraded hardware provides complete protection for you and your devices. Comes with over current, over load, over heat and short circuit protections. Note: voltage transformer USB outputs are completely isolated from the AC power to prevent all your devices from being damaged.