From Halopedia, the Halo wiki
The disruption emitter is an equipment employed within the Banished, broadly similar in appearance to the communications jammers used by the Covenant. When deployed, the emitter temporarily generates a circular field of electromagnetic pulse. During the Second Ark Conflict, Voridus modified certain models of the disruption emitter, increasing the size of the EMP field, though at the cost of reducing its duration. Voridus deployed these emitters during his salvaging operations in the vicinity of High Charity that eventually led to the Flood outbreak on Installation 00.
- Disruption Emitter
In Halo Wars 2, the Disruption Emitter is a leader power available exclusively in the Awakening the Nightmare level What Could Go Wrong?. It has a cooldown timer of 60 seconds. When activated, a disruption emitter is deployed to the targeted location (lasting 180 seconds). It disables all Forerunner units and buildings, including Aggressor Sentinels, Protector Sentinels, Sentinel launching bays, and Forerunner turrets; any affected Forerunner enemies can no longer move or attack, and launching bays no longer deploy Sentinels. The initial deployment also enhance nearby friendly units, and briefly stuns UNSC enemies, but does not disable their movement or attacks.
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