It is travellers companion. It removes the worries of having to exchange currencies any time one travels internationally. Wired EUR is a class if Visa card that makes transaction freely.
Because you don't need to start looking for where to change your local currency for international one, one is free from bank charges and fees.
Using wirex card is not totally free, charges are paid monthly on the card usage, and a particular percentage of what is withdrawn when the card is used on ATM is also charged. This can be disadvantageous for people living in countries where the amount one can withdraw is restricted.
Although it is necessary to get the app or sign up online to register an account and get the accout verified before one can get this card.
All in all, it is interesting to have a card that makes travellings internationally a less difficult task