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Impulse Unit
From Warhammer 40k - Lexicanum
Impulse Units are Adeptus Mechanicus devices, that give those who have them spliced into the base of their skulls, limited control over the Combat Servitors assigned to the Units.[1]
Description
This allows the Servitors to follow behind the Unit's user and also point their weapons at the same target, the user aims at as well.[1]