300 units equals 200 voice minutes. The units are valid for 180 days.
The prepay voucher can only be used inside the predefined countries. The LATAM prepay voucher is available in Argentina, Belize, Brazil, Bolivia, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Uruguay and Venezuela. Including coastal waters (12 Nmi) and Exclusive Economic Zone’s (EEZ)