The Device Detection role is a SaaS Cloud service that provides continuously updated information on hardware based on User Agent string. Sitecore v9 and up uses the data vendor 51 Degrees, previous versions used Netbiscuits.
The Device Detection role is a SaaS Cloud service and has no requirements on solution infrastructure.
Device Detection is referenced by:
Privacy and security
Assuming default behavior, the Device Detection role does not handle personal data.