After repairing Generators for a total of 70/60/50 percent, Flashbang activates:

Enter a Locker while empty-handed and press the Ability button to craft a Flash Grenade.
The Flashbang is left behind when escaping the Trial.

Interacting with a Locker while holding the Sprint button has the following effects:

You do not enter the Locker.
The Locker's doors swing open and close swiftly, feigning a Survivor entering it.
Triggers a Loud Noise Notification at the Locker's location, feigning a Survivor rushing to enter it.
Suppresses the creation of Scratch Marks and Pools of Blood for 3 seconds.
Deception has a cool-down of 60/50/40 seconds.

Unlocks the Self-Care ability, allowing you to self-heal without needing a Med-Kit at 25/30/35 percent of the normal Healing speed.

Increases your Action speeds in Repairing, Healing, Sabotaging, Unhooking, Vaulting, Cleansing, Blessing, Opening, and Unlocking by 3/6/9 percent when in the Injured State.

Unlocks potential in your Aura-reading ability.
Each time a Generator is completed, the Auras of any Generators, Chests, and Totems within 32/48/64 metres are revealed to you for 10 seconds.

If you are holding a Map, any objects revealed by Detectives Hunch will automatically be tracked by it.

After performing a Safe Hook Rescue on another Survivor, Deliverance activates:
Causes your next Self-Unhook attempt to always succeed.
Causes the Broken Status Effect for 100/80/60 seconds after unhooking yourself.
Deliverance is not available during the second Hook Stage or if you are hooked as the last living Survivor in the Trial, regardless of your Hook Stage then.