Traveled to So. Africa and purchased type M adaptors, but this universal one was also needed and proved indispensable, because So. Africa uses several kinds of plugs, not just M's. Charging more than one device would have been impossible with only M-type adaptors. So, if you're traveling with a camera, an iPhone, an iPad, i.e. several devices that may need to be charged at the same time, purchase this universal adaptor in addition to your M-type adaptor(s) and you'll be good to go.