Hi @morpheusdong, Thanks for your query. The licences are provided on a per-device basis so if you have multiple trackers, you will need to ensure these are stipulated in your agreement with Tobii. In case you haven’t already been in touch with the licencing team, you can reach them @ https://developer.tobii.com/license-agreement/
The trackers does not require a connection to the internet to operate and we do not collect data in the background.
Please let us know of any further queries you might have. Best Wishes.