The Zendure Passport III doesn't have grounding and won't convert voltage. It's handy for plugging your devices into different outlets around the world, but it won't change the electricity's voltage.

The manufacturer specifies it supports up to 1000W at 100V and 2500W at 250V, so it can handle higher voltages you'd find outside of the USA. However, it's crucial that your devices are dual-voltage and can manage the local power supply—otherwise, you might run into trouble.

According to our research, some people initially thought it was a voltage converter. One person mentioned buying it thinking it was a step-down transformer, only to realize it was just a plug adapter.

Others have had success using it with high-wattage devices, but everyone seems to agree on the importance of knowing its limitations.

So, if you're using the Zendure Passport III, make sure your devices can handle the voltage at your destination. It does come with a handy auto-resetting fuse for protection against surges, but remember, it won't convert the voltage.

If you're bringing high-power appliances that aren't dual-voltage, you'll need a separate voltage converter.

In short, the Zendure Passport III is great for connecting your dual-voltage devices around the globe, but check your electronics first to avoid any issues.