Best international adaptor I've seen.

This product has all the major input and output formats. Of course, you should only use it for products that can tolerate both international voltages (like computers.) I am very happy with it being one piece because you won't lose any pieces.

Convenient..BUT

NOTE - This does NOT accept grounded american plugs as an input. (You can only plug the 2-prong ungrounded plugs into this, NOT the 3-prong grounded variety) Fortunately I checked this before bringing it along for my upcoming trip as it gave me time to find a different plug adapter which can accomplish this, as my laptop charger has a grounded plug, and I'll certainly be needing it.Also, it obviously does not convert the voltage. It is convenient if you have no need for the grounding pin and need something to charge your devices overseas.

A must have for travelers

While most power adapters are 110 -220 friendly, electrical plugs are not traveler friendly. Standards are sometimes even mixed within a given country. This compact, inexpensive device connects most plugs and most sockets simply. Don't just buy one. Get a couple so you can connect multiple power supplies just about anywhere.

Have visited 140 countries. This works in 98% of them and also accepts three prong grounded plugs!

I travel for the US government and to say that I am a road warrior is putting it mildly. I have used this adapter in many countries on every continent and it is an extremely RARE occurrence when it won't fit into an outlet. I have also noticed many reviews claiming that this adapter cannot be used with a three-prong grounded plug. Funny, since I am typing this review on my laptop that uses three prongs and is plugged into this Kensington adapter. Maybe those that complain should look closer. This road warrior recommends this product most highly. It is one of the best purchases I have ever made!

please explain how this device works with three prongs?

there are several reviews that say this does work with three prong laptop plugs. I can't figure it out so can someone explain? I have a Mac and the plug doesn't seem to want to fit it.