I've used the non-USB model for several years. It is small & neat, and easy to slot together for packing or storage. The colors make it simple to find which one you need. Has never failed me yet. I just bought the 'USB' model and expect same reliability. Unless it's changed, the country list & required plug are on the box, so keep that box. Office very helpful as well.
5-in-1 Universal Travel Adapter + USB box set
Meet your new best friend: The 5-in-1 Universal Travel Adapter has the same great features as our beloved 4-in-1, but with the addition of two 2.1A USB ports! The white, detachable charger is powerful enough to charge all of your essential travel devices—even your tablet and DSLR camera. Our color-coded world adapter system makes finding the right plug for your trip as simple as matching the colors.
Note: Adapters do not convert power. Ensure that your electronics are rated 100-125 or 220-250 volts.
I loved it so much I bought more for Christmas presents for family.
Comparing Universal Travel Adapter + UBS with other multi adapter, this is more convenient to travel, It doesn't add much weight to the adapter itself (after plugging into the power source) as other adapter will become loose and not properly receive power source.
These converters are very simple to use and they are incredibly useful while traveling overseas. The colors make it very simple to determine which one to use. I would highly recommend these converters to anyone travelling internationally.
Bought this for my daughter who travels internationally 3 - 4 times per year. She was thrilled with it. She just left on a trip where she will use three different power sources. fesources
This was a well received gift.