The AT HOP card is a dark blue credit-card-sized stored-value contactless smartcard that can hold prepaid funds (called HOP Money) to pay for fares or for monthly passes for unlimited travel within one or more of three "transport zones". Either facility must be added to the card before travel. Passengers "tag on" and "tag off" their card on electronic terminals when entering and leaving the transport system in order to validate it or deduct funds.
