[100% Pure Sine Wave Save Your Devices] Pure sine wave power is a quieter, cleaner, and more reliable power source than you use at home. DOACE Travel Converter can output high-quality pure sine wave voltage to protect your electronic devices, appliances with motors, audio and video equipment, and medical equipment. ?? Electronic devices like laptops, phones need pure sine wave to keep them working normaly, minimize potential voltage fluctuations to safeguard your devices' inner electronics, and protect theirs batteries. Laptops charged with pure sine waves have an average lifespan of 50% longer than other wave voltages. ?? Medical equipment like CPAP, if you use it to help you sleep, you'll be better off with a pure sine wave converter. Some CPAP warn that it may be damaged by a modified sine wave converter, and others warn that CPAP will work, but the humidifier unit may be damaged! [2024 Protection Design] DOACE converter safety protection includes input under-voltage (low voltage), over-voltage, over-temperature, overload, over-current, and short-circuit protection. If it's overloaded, the switch closes to protect devices from damage, blinking to alert for overload. Then wait for the transformer to cool and reactivate. However, avoid overloading repeatedly as this can damage the circuit and reduce life. ??Note: Only for devices under 350W continuous power and 500W start-up power (some devices require more power to start than to sustain, such as hair straighteners). If you're not sure if your device is compatible with our converter, simply try it out before your trip, since DOACE converter always output 110V/60HZ power, supporting use in the US. And if they keep running for 10 mins without heating up, it's OK to put in your travel bag. [Use US Power Worldwide] DOACE voltage converter kit equips 1 EU power cable and 4 international adapters (Type I, E/F, G, A, L). Converts all countries' voltage 100V-240V (60/50Hz) to US Pure Sine Wave voltage 110V (60Hz). So you can use your US devices in more than 160 countries, such as the France, Germany, UK, Europe, Italy, Australia, Italy, Japan, China, etc. Even in US, you can use it as a power strip. [7-1 Fast Charging] DOACE Power Converter features 7 charging ports, including 3 sockets and 4 USB ports. It can charge 7 devices simultaneously at 350W. USB includes 2 PD 20W fast charging USB-C ports and 2 QC 18W fast charging USB-A ports. In addition, USB outputs are completely isolated from AC power for safe device operation. [Travel Essential] DOACE travel power converter has a compact size (6.3?4?1.57 in/1.4 pounds) and 4-foot power cable for convenient packing and use.