The Differential Microphone (rare, worth 1,000) spawns on Pendola Pass only. You need it for upgrading the Research Station from level II to III (3 Differential Microphones, with 3 Exodus Technical Handbooks and 6 Bully Fragmenters). The Calculator and Thermal Shaker spawn in exactly the same places, so you'll farm all three on one route.
Quick Answer
- Map: Pendola Pass only.
- Best areas: Commissary Supermarket, Almatera Station, Cielo Sereno Observatory and Freight Terminal.
- Search: shelves, train-car tables and seats, counters and tables, or consoles and desks.
- Loot type: Technological and Electrical.
- Loot zones: check the map at raid start. Areas marked yellow (Loot value: Medium) roll better loot, and red ones (Loot value: High) more and better still.
- You need: 3 for the Research Station upgrade from level II to III.
What Kind of Places to Search
Most of its spawn spots are loose loot, lying out in the open, so look at surfaces as you move through a building. Containers (cabinets, desks, bags, breachable boxes) can hold it too. Share of all its spawn spots on Pendola Pass:
| Where | Share of spots |
|---|---|
| Shelves and storage racks | 51% |
| Train cars: tables and seats | 10% |
| Tables, chairs and counters | 7% |
| Consoles, desks and control panels | 5% |
| Office desks and filing cabinets | 5% |
| Parked vehicles | 4% |
Where we and other Raiders have picked it up:
How to Get to the Almatera Station Shelf Room
The best single room we've found for Frozen Trail materials is on the second floor of Almatera Station, inside the station building. Walk in through the main entrance, take the escalators up, and the room full of metal shelves is right at the top. Walk every row and look at each shelf.
On a raid where Almatera Station was a red zone (Loot value: High), these shelves alone gave a Radial Press, Laser Level, Insulation Roll, Thermal Shaker, Hand Drill, Steel Cable and Sheet Metal. As a yellow zone (Loot value: Medium) the same room still gave a Radial Press, Hand Drill and Calculator.
Best Areas on Pendola Pass
The places with the most spots where the Differential Microphone can spawn:
- Commissary Supermarket (985 spots)
- Almatera Station (402 spots) · how to reach the shelf room
- Cielo Sereno Observatory (268 spots)
- Freight Terminal (207 spots)
- Railyard (149 spots)
Open the Pendola Pass map to plan a route through them. Spots are only chances: every spot can roll many other items too.
Tips
- Train cars are quick wins. Parked passenger cars have a table and seats per bay; walk the aisle and look down.
- Head for the loot zones. Each raid marks some areas yellow or red on the map, and they change every raid. Yellow already rolls better loot; red rolls more and better loot still.
- It weighs 0.5. Keep picking them up; three is all a project asks for.
- Key rooms pay off. In the footage we went through, the Almatera Station, Cielo Sereno Observatory and Old Town key rooms gave Laser Levels, Insulation Rolls, Epoxy Buckets, Thermal Shakers, Calculators and a Radial Press.
Related Guides
- Where to find the Calculator (same spots)
- Where to find the Thermal Shaker (same spots)
- Where to find the Epoxy Bucket
- Where to find the Hand Drill
- Where to find the Laser Level
- Where to find the Insulation Roll
- Where to find the Radial Press
- Where to find the Mini Pump
- Where to find Planks and Sheet Metal
- Everything the Outpost asks for: our Needed Items guide and the Outpost steps in our amplified weapons guide
Spawn data from the Arc Raiders 2.0 game files; screenshots: Arc Raiders Hub.