A sage in Mithrava told you that upheaval in the jungles of Havarl often unearths Remnant devices that would otherwise remain buried. Studying these devices could reveal more information about Remnant technology.
The Remnant devices were pushed out of the ground by overgrown roots. There are no navpoints for them. The devices will always be on a root cluster and easy to identify by the blue/white sparking aura they give off. Only eight of them need to be collected to finish the task.
In total there are 21 devices split in three types that can all be collected. There are seven devices of Type 1 and seven of Type 2 which grant +15 each. There are also seven Type 3 devices that award +50 . Ryder will be able to find enough devices by following the edges of the map but the additional devices can be found for a total of +560 .