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All Subdetection Unit locations in Genshin Impact

Another troublesome bug.

The Subdetection Unit is a Fontaine local specialty that can be found in the northern parts of the region. There's a limited number in the wild, so I recommend picking them up whenever you encounter them.

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Subdetection Units are used as Ascension materials for Wriothesley and possibly other Fontainian characters in the future. They're artifices component created by the Fontaine Research Institute to monitor environmental data and visually looks like a mechanical bug. Here's how to get them in Genshin Impact.

Where to farm Subdetection Units in Genshin Impact

The Subdetection Unit looks like a mechanical bug that glows blue and red; its small size makes it difficult to spot. While it's visually similar to a Scarab, it doesn't move nor run away, so you won't have any trouble picking it up.

Most Subdetection Units are scattered across Fontaine's northern Liffey Region, and there aren't enough to fully Ascend a character in one day. If you run out of them in your World, I recommend entering a friend's World through Co-op mode and asking to farm theirs.

Related: All Lumidouce Bell Locations in Genshin Impact

Above Ground

Image via HoYoverse's Teyvat Interactive Map

The image above shows the locations of all the Subdetection Units you can find in Fontaine. They're mostly clustered in the northern part of the region.

Underground

Image via HoYoverse's Teyvat Interactive Map

Reference the image above for the locations of all the Subdetection Units you can find in Fontaine's underground areas. They're directly under the areas featured in the prior above-ground image, so you can access them either by swimming or entering a cave.

For more Fontaine local specialties, check out our guide on All Lumitoile locations in Genshin Impact here on Pro Game Guides.


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Nicki Si
Nicki is a freelance writer with 5 years of writing experience. She's a fan of anything from HoYoverse, from Genshin Impact to Tears of Themis and Honkai: Star Rail. She also loves rhythm games like BanG Dream! and D4DJ.