K-ETA (Korea Electronic Travel Authorization)
K-ETA eligible nationals, who wish to enter visa-free the Republic of Korea, must obtain K-ETA approval before boarding the flight or ship.
You can apply for K-ETA via the official website or mobile App(K-ETA).
Please keep in mind that the assessment can take more than 72 hours depending on the situation.
K-ETA fee is 10,000KRW (approximately USD $9~10, additional fee excluded) and is non-refundable even if the application is denied.
Those who have the K-ETA are not required to submit an arrival card at the port of arrival.
Please visit the link
for more information