The system uses the satellite-based identification of vehicles entering and leaving the toll area. The identification is performed by the built-in GPS module. The module is part of a special unit built for this purpose.

The unit is called OBU and must be built in the vehicle. Another module that is part of the OBU transmits the data to the EETS Provider using a GPRS connection.

The billing center keeps track of the users travels which the user may view his travels in real time over the Internet or using a mobile phone. Once a month the user receives an invoice for road tolls and other services enabled on the users OBU.