Any generator within a range of 128 meters that is being repaired by two or more Survivors is marked by a yellow aura.  When the generator is first highlighted, Discordance triggers a loud noise notification on the generator.  After the generator is no longer within range or is no longer being repaired by two or more Survivors, the aura remains for another 4 seconds.

Hoarder triggers a Loud Noise Notification for 4 seconds, whenever a Survivor performs any of the following actions within 32/48/64 meters of your location:

Unlocks a Chest.
Picks up any Item, including Limited Items.
Hoarder spawns 2 additional chests in the Trial.

Injuring a Survivor by any means lights a Dull Totem, activating the Hex.

While the Hex is active, all other Survivors outside of your Terror Radius will scream every 25 seconds, revealing their positions and auras for 2 seconds.

If the Hex totem is cleansed, this perk is permanently disabled.

You reduce the duration of pallet stuns by 50percent.  Has no effect while carrying a Survivor.

The Auras of regressing Generators are highlighted in white.

If the Regression progress is interrupted on a Generator, its Aura will be highlighted in yellow for 8/12/16 seconds.
Surveillance increases the audible range of Survivors Generator-repairing noises by 8 meters.

Increases the volume of Survivors Grunts of Pain by 25/50/50 percent.
Increases the volume of Survivors regular breathing by 0/0/25 percent.