fallout

When Christine is a companion, she grants you a short period of time near a speaker before your bomb collar starts to activate as well as increasing the amount of time before your bomb collar detonates by 50%.— In-game description

Signal Interference is a companion perk in the Fallout: New Vegas add-on Dead Money.

Requirements

Gaining Christine Royce as a companion requires completing Find Collar 12: Christine by rescuing her from the malfunctioning Auto-Doc inside the Villa clinic within the Medical District. This itself requires navigating past holograms and speakers to cut off the building's power in the clinic basement.

Effects

When Christine is an active companion, the player character gains a window of delay before their collar begins beeping (represented by a static noise sequence) when in range of any radio or speaker as well as a 50% increase to the duration of the beeping sequence before detonating.

Notes

The perk specifically grants an additional 5 seconds before the collar starts beeping and an additional 5 seconds before the collar detonates, overall increasing the total time one may spend near a radio or speaker from 10 to 20 seconds, an effective 100% increase.