Aerea has a unique fair use policy. They are so fair that you don't have to worry about data limits. There simply aren't any.
Click here if you would like to view the fair use policy (PDF).
You need Acrobat Reader to be able to read the PDF files. Download and install the free software on your computer.
To save the fair use policy on your pc or laptop, click your right button here and choose 'save target as'.