A family member is traveling to Paris, soon. I have an electrical adapter question. :)

[TreasonousBastard]

1. If the blow dryer is rated 125/250...

it should have a switch somewhere to change the voltage. In this case, any old high current capable adapter should do. If there's no switch, it could automatically sense the voltage and deal with it, although this might not be something to be trusted.

European frequency is 50 Hz, but rarely does that cause a problem with modern motors. Besides, it's possible that the motor is DC and then it makes no difference at all because the dryer converts it internally.

The instruction book (if you still have it) or maybe some online instructions or FAQs or a call to the manufacturer, will have any other info you need.

Plan B might be to buy one locally and gift it to the host family when leaving.

on edit...

The other two gadgets are 120 only, so a voltage reduction adapter will be needed. If it's big enough it could also power the hair dryer on 120v but the ones with that kind of wattage cost bigger bucks.