On my trip to Paris and England in May I bought separate convertors and they worked fine., Mainland Europe countries have different outlets than England. So the convertors are different. Frankly, I didn't need them because the rooms came with USB jacks. But I used them anyway. They also had a 120vac outlet which I used to charge my camera batteries. (No good for hair driers though) I don't recall if the hotels provided a 120vac outlet. Of course, if you;re traveling around, it's good to have the convertor to plug into a local restaurant or other places' outlet.