Whenever and wherever you want, reload your OPUS card.
RTC - Recharge Opus — description
Recharge OPUS is a flexible solution for buying transit fares and adding them to your OPUS card, wherever and whenever you want.
Not only is Recharge OPUS a tool for buying transit fares and adding them to an OPUS card, but it also allows you to read the contents of your OPUS cards and non refillable smart cards.
Recharge OPUS was developed as part of the ARTM’s Digital metropolitan project, in which all public transport players joined forces to bring users this practical solution for purchasing transit fares.