DRM info is about Digital Right Management (DRM) module of the device. It would show which DRM certificates are installed on the device. This would indicate if it is possible to stream Netflix in HD (or 4K), YouTube 4K etc. Google Widevine L1 certficiate for example...
This can be inspected with "DRM info" app. https://play.google.com/store/…androidfung.drminfo&hl=hr
Everyone can find technical specs you copy/pasted but it's much more interesting to see if this "4K streaming device" can; well - stream 4k content from Netflix or Amazon Prime.
