This is the "SuperCard," the evolved version of the "EasyCard." If you have a balance in the "Easy Wallet" app, you can use your phone's NFC function to top up (add money to) your EasyCard anytime, anywhere with your mobile phone. The EasyCard is an essential item for traveling in Taiwan. It can be used for transportation on the MRT, trains, and buses, as well as for payments at convenience stores and other locations (similar to Suica and PASMO cards in Japan). Since you don't receive change with cash, having an EasyCard is very convenient. The balance is 0 New Taiwan Dollars (NT$). You can start using it immediately after topping it up.