Device (unit type)

Not to be confused with the upgrade material.

In Arknights, devices, referred to as traps in the game files, are various units other than Operators and enemies which could help the player or hinder them.

Deployable[]

Deployable devices are available for deployment to the operation's map like that of Operators at the cost of DP. The player only have a limited number of deployable devices available, which cannot be replenished even if the device is retreated, but deployable devices' cost do not ramp up as Operators do and they does not use up the Unit Limit.

Most deployable devices are invulnerable; exceptions are noted in the tables below.

General[]

Device	Use
Roadblock	Can be used to reroute enemies by forcing them to take a different path. Can be destroyed by enemies if it blocks one or when deployed in the way of Lava Cracks.
Jammer	Introduced in Episode 05, renders Drones in its AoE unable to attack, reduces their speed, and Silences them. Can be attacked by enemies, who targets it over friendly units.
Interference Mine	Introduced in Episode 07, deals heavy True damage to enemies and temporarily amplifies the damage they took, but takes a while to be armed once deployed.
Shieldguard	Introduced in Episode 08, blocks the path of enemies to buy the player time to dispatch them.
Portable Supply Station	Introduced in Code of Brawl, periodically gives additional SP to friendly units.
Rhodes Island Temporary Employee	Introduced in The Great Chief Returns, can be used to clear out Giant Mushrooms and create Stumps.
Mieszko Coil	Introduced in the Maria Nearl event, intermittently generates an electric arc when placed close together that deals Arts damage and Slows enemies caught in its wake. Can be destroyed by splash damage from enemies; otherwise enemies never target it.
Mr. Boom	Introduced in the Maria Nearl event, Stuns enemies caught in the detonation.
Two-Step Firecracker mk2	Introduced in Who is Real, deals Arts damage to enemies caught in the detonation and switches their Hui/Ming attribute; can also be used to switch the Hui/Ming attributes of Marks of Hui and Ming.
Reinforcement Device	Introduced in Operation Originium Dust, can be used to reinforce Dirt Mounds.
High-Energy Originium Bomb	Introduced in Operation Originium Dust, deals heavy True damage to enemies or instantly destroy Dirt Mounds caught in the detonation. Can be attacked by ranged enemies.
Snowsant's Safe Escape Crane	Introduced in Defence Protocols, rapidly retreats an Operator and greatly reduces their redeployment time.
Custom Floating Platform	Introduced in Dossoles Holiday, allows friendly units to be deployed over Deep Water Zones. Will be destroyed if the friendly unit on it is knocked out or retreated.
Erosion-Resistant Coating Application Device	Introduced in Dossoles Holiday, makes a friendly unit immune to Erosion. Only usable in DH operations through the use of certain Stickers.
Demolition Device	Introduced in Episode 09, can be used to immediately bring down Tattered Pillars or damage and push away enemies.
Battlefield Ruin	Introduced in Episode 09, left behind on deployable melee tiles in a collapsing Tattered Pillar's way and behaves identically to Roadblocks.
Knight Crest	Introduced in Near Light, can be used to permanently provide visibility to a specific melee/ranged tile.
Broken Fog Machine	Introduced in Phantom & Crimson Solitaire, reduces the speed of surrounding enemies but will self-destruct after a while.
Gas Tank P.	Introduced in Phantom & Crimson Solitaire, pushes away surrounding enemies once deployed.
Hand of the Saint	Introduced in Stultifera Navis, launches the namesake towards its deployment direction that damages and Stuns enemies it comes in contact with. Can be modified with Little Handy components.
Self-Driving Cart One-Way Road	Introduced in Ideal City, redirects incoming Self-Driving Carts into another direction and gives them a momentary burst of speed.
Allerdale's Guard	Introduced in Episode 11, summons Allerdale who creates a Barrier on a friendly unit and others nearby.
First-aid Kit	Introduced in Mizuki & Caerula Arbor, can be used to heal friendly units.

Integrated Strategies[]

Device	Use
Dice	Featured in Mizuki & Caerula Arbor, may reduce the ASPD and speed of enemies, and cuts friendly units' redeployment time depending on where the Dice lands; the higher the number, the better the effect. Consumes 1 dice roll when used and only one is available in each operation.
Barrier	Featured in Mizuki & Caerula Arbor, can be used to stall enemies with its block count of 4 and good HP. Given through Support Riot Pile.
Tide-Hunt Knight	Featured in Mizuki & Caerula Arbor, will be pre-deployed in operations up until and including the 4th floor when the player has the Breath of the Tide, and must not be defeated until the player enters the 5th floor to reach the Age of the Silence ending. Has good stats and his attacks can push away enemies every several attacks.

Stationary Security Service[]

Device	Use
Contaminated Mineral	Featured in Nature's Premature Death (Iron Carrot Mine), prevents anything in the Deployment Waiting Zone but the Contaminated Mineral itself from being deployed. If the deployed Mineral is not destroyed in a given amount of time, friendly units in a cross-shaped radius to it will take True damage and be Stunned; destroying the deployed Mineral allows the player to remove a unit in the Preparation Area in return for Transfer Permits. Periodically added to the Deployment Waiting Zone as long as "Milan" is present.
Heat Cluster	Featured in Nature's Premature Death (Iron Carrot Mine), all deployed friendly units will receive True damage and be Stunned when the Heat Cluster is transferred to the Deployment Waiting Zone. Periodically added to the Preparation Area as long as "Milan" is present.
Fluorescent Spores	Featured in Long Journey (Glebe Mining Platform), spawns two Fluorescent Originium Slugs at where the Spores is deployed, which goes for the nearest Protection Objective. Periodically added to the Deployment Waiting Zone (Recuperation Area if the Waiting Zone is full) as long as the "Drifting Cabin" is present.
Fragrant Essential Oil	Featured in Bottomless Pit (Słoma Processing Platform), spawns additional enemies which comes in larger numbers and upgraded in subsequent uses. The player will be forced to use this, Gloompincer Shell Meal, or High-Efficiency Baking Powder whenever the Danger Level rises while the "Fruit of Gluttony" is present.
Gloompincer Shell Meal	Featured in Bottomless Pit (Słoma Food Processing Platform), buffs the ATK and DEF of the "Fruit of Gluttony", which can stack without a limit. The player will be forced to use this, Fragrant Essential Oil, or High-Efficiency Baking Powder whenever the Danger Level rises while the Fruit is present.
High-Efficiency Baking Powder	Featured in Bottomless Pit (Słoma Food Processing Platform), all friendly units will take True damage every second while the "Fruit of Gluttony" is present, which can stack without a limit. The player will be forced to use this, Fragrant Essential Oil, or Gloompincer Shell Meal whenever the Danger Level rises while the Fruit is present.
Modified Phytohormone	Featured in Acahuallan Jungle (Stationary Security Service), removes pollen from tiles pollinated by the Nature's Compromise's Growth Hormone, preventing Small Symbionts from spawning on said tiles. One will be added to the Deployment Waiting Zone (Preparation Area if the Waiting Zone is full) when the Compromise unleashes Deciduous Hormone.

Reclamation Algorithm[]

Device	Use
Camouflage Device	Camouflages friendly units around it.
Crabbie Pumpie	Deploy on Clear Water to periodically gather Fresh Water.
Emergency Repair Vehicle	Repairs a damaged Construct ahead of it and self-destructs after a while.
Gathering Hub	Periodically spawns up to 3 Basic Harvesters to gather resources in range. Basic Gathering Hubs have standard gathering efficiency and Harvester spawn rate. Improved Gathering Hubs have increased gathering efficiency, Harvester spawn rate, and durability. Executive Gathering Hubs have further increased gathering efficiency, Harvester spawn rate, and durability, and can support 4 Harvesters.
Hypnotic Censer	Temporarily puts surrounding enemies to Sleep; Wild Beasts are pacified for longer and become docile again upon waking up.
Refreshing Potion	Significantly boosts the ASPD of an Operator ahead for a period of time, but forces them to retreat upon expiring.
Remote Shield Generator	Periodically protects the friendly unit ahead of it with a Barrier that grows stronger the more they receives it.

Static[]

Static devices are permanently placed on the operation's map and can be used at the player's discretion through the device's skills. Not all static devices are useful for the player; some are hostile to friendly units and are activated on their own without the player's intervention.

All static devices are invulnerable with exceptions noted in the tables below.

General[]

Device	Use
Stun Generator	Damages and Stuns surrounding enemies at the cost of some DP.
Detector	Reveals nearby invisible enemies when activated.
Turret	Introduced in Episode 05, periodically fires a bolt straight ahead that damages the first friendly unit hit by the bolt.
Originium Ice Crystal	Introduced in Episode 06, periodically releases a frigid wave that inflicts Cold to friendlies caught in its wake. There is also a friendly variant named FrostNova's Originium Ice Crystal, introduced in Episode 08.
Originium Altar	Introduced in Episode 07, periodically releases a pulse of Originium energy that deals True damage to anyone, friendly or enemy, caught in its wake. Sarkaz Guerrilla Casters and Fighters take no damage from the pulses and will be enhanced instead. There is also a friendly variant named Patriot's Originium Altar, appearing in Episode 08.
Static Roadblock	Introduced in Episode 08, prevents allied units from moving through and reroutes enemies like Roadblocks until destroyed by friendly units, who can attack them but targets enemies over the Static Roadblock.
Energy Aggregate	Introduced in Episode 08, will release fireballs that deal Arts damage and inflicts Burning Breath to the four cardinal directions if not destroyed by friendly units first, who attacks them over enemies.
Command Terminal	Introduced in Code of Brawl, can be activated once charged at the cost of DP to increase Unit Limit. Can be attacked by enemies; the player will lose 1 Life Point if a Command Terminal is destroyed.
Originium Flow Generator	Introduced in Darknights Memoir, generates a strong airflow that increases/decreases the ATK of friendlies and the speed of enemies depending on their direction towards the airflow.
L-44 Gramophone	Introduced in Twilight of Wolumonde, attacks enemies with percentage-based Arts attack and heals friendlies once captured by deploying friendly units adjacent to it. Certain enemies can contest Gramophones, eventually turning them hostile.
Giant Mushroom	Introduced in The Great Chief Returns, increases the DEF of adjacent friendly units and can be cleared by Rhodes Island Temporary Employees to create Stumps.
Imprisonment Device	Introduced in Mansfield Break, temporarily Stun enemies and imprisons freed Prisoner enemies caught in its wake at the cost of some DP. Can be attacked by enemies.
Rubble	Introduced in Contingency Contract Lead Seal, reroutes enemies like Roadblocks until destroyed by enemies, who can attack them if it blocks one.
Dirt Mound	Introduced in Operation Originium Dust, blocks Sandstorms and reroutes enemies like Roadblocks. Can be damaged by Sandstorms (unless once reinforced) and attacked by enemies if it blocks one.
Mobile Tactical Hangar	Introduced in A Walk in the Dust, spawns Air Support Drones when they are summoned by certain enemies.
Emergency Aid Building	Introduced in Under Tides, gradually removes Nervous Impairment build-up when activated by a friendly unit or Automatic Maintenance Drone adjacent to it, the latter of which improving the Nervous Impairment removal rate.
Tattered Pillar	Introduced in Episode 09, can be damaged by reducing its HP to 0 and collapsed by attacking it once damaged, severely damaging enemies in its way or instantly knocking out friendlies and leaving behind Battlefield Ruins on deployable tiles. Can be instantly collapsed with Demolition Devices, but can only be attacked/damaged by adjacent friendlies.
City Neon	Introduced in Near Light, provides visibility to the nearby tiles which is expanded once activated at the cost of some DP.
Gelato Stop	Introduced in Guide Ahead, periodically generates SP to friendlies or replenish the ammunition used by certain enemies once captured by attacking it, at which the Stop releases a pulse that damages and Stuns nearby hostiles. Units will attack hostiles over the Gelato Stop.
"Tuba"	Introduced in Lingering Echoes, emits a Realigned Flux to the direction it is facing.
L-7 "Whisperer"	Introduced in Lingering Echoes, redirects the Realigned Flux into another direction.
"Resonator"	Introduced in Lingering Echoes, can be charged up by linking it with Realigned Fluxes; once fully charged, friendly units can be deployed on it, who emits a new Realigned Flux to the direction they are facing.
Self-Driving Cart Launchpoint	Introduced in Ideal City, spawns a Self-Driving Cart when its skill is used at the cost of DP. Certain Gears can change the Launchpoint's skill to become toggled, continuously spawning Carts as long as the player have enough DP until deactivated.
R-Series Power Armor	Introduced in Dorothy's Vision, will generate SP when an Experiment Product comes in contact with them and becomes activated as the corresponding R-Series Power Armor enemy should their SP is maxed out this way.
"Twigs That Crave"	Introduced in Episode 11, continuously expels Corruption in the vicinity that also inflicts Necrosis Damage build-up once at below 50% HP. When destroyed, a Rot Eater will emerge from the Twigs with reduced stats based on how many enemies are defeated before the Twigs is destroyed; the Twigs will self-destruct once all other enemies are defeated, in which case the Rot Eater emerges with full stats.
Roadblocks	Introduced in Where Vernal Winds Will Never Blow, able to block a large number of enemies to stall them until destroyed.

Integrated Strategies[]

Device	Use
Unowned Treasure	Featured in Phantom & Crimson Solitaire, randomly spawns in (Emergency) Operations and gives out additional Originium Ingot upon clearing the operation as long as it remains intact; the Treasure is destroyed when an enemy comes into contact with one.
Host's Assistant	Featured in Phantom & Crimson Solitaire, periodically deals True damage to surrounding friendly units and reduce their ATK. Can be destroyed by friendly units, who attacks enemies over it; destroying the Assistant is the only way to damage the "Troupe Mouthpiece".
Treasure Chest	Featured in Mizuki & Caerula Arbor, randomly spawns in (Emergency) Operations and comes in three versions: The basic version which gives out Originium Ingots when destroyed. The Spiked Treasure Chest which gives out more Originium Ingots when destroyed, but will damage friendlies attacking it. The Chest Seaborn which turns into the namesake when destroyed that will give out even more Originium Ingots when defeated.

Trials for Navigator[]

Device	Use
Entitative Program	Greatly buffs the maximum HP, ATK, and DEF of friendly units for the current wave. Can only be activated after clearing the wave where the Entitative Program appears and then reaching the specified wave upon redoing the TN operation.

Multivariate Cooperation[]

Device	Use
Pulse Defense Module	Featured in Old Plate Ruins (Defence Protocols), can be used by the upper player to deal massive True damage and Stun enemies on the lower layer.
Drone Factory	Featured in Ancient Ruined Tower (Defence Protocols), can be used by the upper player to spawn a Cheap/Remodeled Second-hand Drone on the lower layer.
Teargas Control Valve	Featured in Abandoned Factory (Defence Protocols), can be used by the upper player to temporarily stop noxious gas from being released on certain parts in the lower layer.

Reclamation Algorithm[]

Device	Use
Base	The player's base of operations in the Headquarters. The player will lose a campaign when the Base is destroyed, so protect it at all costs!
Buried Metal Chest	Gives out valuables when destroyed. Spawns randomly in combat zones.
Bush	Gives out additional resources when destroyed. Spawns randomly in combat zones.
Escape Route	Send off an Operator here to establish Transregional Communication (can carry over some resources from this campaign to the next one). Spawns randomly in combat zones.
Historical Remains	Reveals a secret area in combat zones when destroyed. Must be spotted first before the Remains can be attacked, which is often located on inconspicuous positions.
Mobile Battle Tower	Elite Raids will appear from time to time on Mountain Passes until the Towers there are destroyed, which can summon reinforcements to protect against invaders.
Monoliths	A source of Stone found in Resource Zones that can be harvested by Operators and Basic Harvesters.
Strange Ore Vein	A source of Iron Ore found in Resource Zones that can be harvested by Operators and Basic Harvesters.
Thickets	A source of Wood found in Resource Zones that can be harvested by Operators and Basic Harvesters.
Thorned Treasure Chest	Gives out rare valuables when destroyed, but will harm attackers. Spawns randomly in combat zones.
Veteran Hunter	Poaches Wild Beasts on Hunting Zones to harass the player until taken out, who can relocate into another spot every so often and dodge Physical/Arts attacks. Defeating the Hunter allows the player to claim their quarry along with some valuables.