USD is the Fiat currency for the debit card. However, you are from a different country where USD is not used. 

Can you still use the card?

The answer is Yes! 

Cardholders from more than 180 countries around the world can use the card for ATM withdrawals and make purchases from more than 30 million merchants both online and offline

The process involves the conversion of the USD to the local fiat currency. For instance, when a cardholder makes a transaction such as an ATM withdrawal, then the machine will calculate the value of USD to the value of the fiat currency of the country and the ATM machine will withdraw the local fiat currency equivalent to the USD value.

Please note that the charges will be applicable according to the bank where the withdrawals are made.