Your Australia plug does not fit wall outlets in South Korea. You will need a physical plug adapter (Type C, F). Mains voltage is similar (230V vs 220V), so dual-voltage chargers work without a step-up/step-down converter. Electrical frequency also differs (50Hz vs 60Hz). Modern digital chargers are dual-frequency (50/60Hz), but analog motor-driven clocks or clippers may run slightly faster or slower.
Compare leading certified universal travel adapters equipped with multi-region prongs, GaN fast charging, and auto-resetting safety fuses.
Look at your device power brick or label:
Yes. Phone chargers are universal dual-voltage (100-240V). If the plug prongs do not match, a standard travel plug adapter is all you need.
South Korea uses Type C, F. Look for 3-pin adapters if your appliance uses a grounded plug.