How much is the traffic usage of a REX with GSM modem?

Assumed that a REX is connected to the myREX24 server 24/7 in idle, our tests revealed that it can demand up to 80 MB per month (also depending on the internet provider, 80 MB was the highest value that ever obtained in our tests).

As soon as a user connects to the REX via VPN or data values are logged via the REX, the data volume will be higher.