In my time here, I've found only two electrical items (brought from the US) that did not "work" here.

The first was an on-off timer. Let's just say that whatever electrical item I had attached to that timer would turn on and off at progressively odd times of the day. (Cause: 50hz vs. 60hz difference)

The other was a hot air popcorn popper I had carried over from the US oh so many years ago. It never popped a single kernel. The kernels were merely pushed around the bottom of the popper (when the hot air vent was), and ended up being "roasted" a dark golden brown. (Cause: 100v vs. 120v difference--just didn't have enough "juice" to pop the corn.)