Can I use a travel adapter for a hair dryer?

Only if the hair dryer says 100-240V on its label. Most don't — they're 120V only. Using a 120V appliance on 220V will burn it out immediately. Buy a dual-voltage travel hair dryer instead.

Do I need a travel adapter for USB charging?

If the hotel has USB outlets, no. Otherwise yes — you still need to plug your charger into the wall. Many modern hotels now have USB-A and USB-C outlets built into the nightstand.

Best Universal Travel Adapters 2026