Imprisonment Device

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Imprisons freed enemies within its effect area.
—Description of operations featuring the Imprisonment Device

The Imprisonment Device is a static device in Arknights. It is an apparatus manufactured by Rhine Lab and utilized in Mansfield State Prison to pacify unruly inmates where it forcefully reactivates the restrainment collars they wore.

Imprisonment Devices are indispensable in MB operations because of their ability to emit a blinding flash at the cost of 5 DP that Stuns enemies within its area-of-effect and causes freed enemies to revert into their imprisoned state, thus using Imprisonment Devices at the right moment can save the player's Operators from being overwhelmed. However, do note that Prisoner enemies who were already imprisoned won't have the attack count needed to free themselves reset when they are hit by the Imprisonment Device.


Side Stories MB-2MB-3MB-4MB-5MB-6MB-7MB-8MB-EX-1MB-EX-2MB-EX-3MB-EX-4MB-EX-5MB-EX-6MB-EX-7MB-EX-8MB-TR-1
Story Collections TC-8
Annihilation South Prison
Contingency Contract Federal PrisonLocked-Down Prison
Trials for Navigator Troubled Prisoner
Paradox Simulation Bagpipe: Spear of VictoriaMountain: Immovable as His Name


2000 0 0 0
DP cost Redeployment time Block count Attack interval
N/A N/A 0 N/A


Lock 'em Up!
Auto Recovery
Effect Initial SP SP cost Duration
Consumes 5 DP to immediately Stun all targets within range for 2 seconds and Imprison them (Will not reset the attack count of Imprisoned enemies) 0 25


Enemy Interaction
Sniper Prisoner
Elite Sniper Prisoner
Caster Prisoner
Deadly Caster Prisoner
Attacks Imprisonment Devices over friendly units.
Jesselton Williams
His ranged attacks (including the special ones) in the Jailer form will never target Imprisonment Devices.


  • When an Imprisonment Device is destroyed, the tile where it was on becomes darker.