From Paragon Wiki
The Limbo Device is a device required for Neuron's plans.
|The Limbo Device blocks all forms of precognition or telepathy within a short radius. The Syndicate were using it to mask their guests from the Seers. Unfortunately, the loss of a Seer's precognition is readily noticeable, and so triangulating the position of a Limbo Device is actually fairly easy. The tricky part is dealing with whomever it belongs to.|
Neuron needs the device to help him implant Simon Omega's brain into one of his experiments.