Flash Pack
The power of a flash bomb married to the wireless magic of mainframe technology.
Flash Packs are items which can be primed and detonated to deal 2 KO damage to guards in a radius of 3 tiles.
Priming a Flash Pack requires Anarchy skill level 2 and places a copy on the ground. The item remains in the inventory and begins a cooldown of 12 turns, similar to priming EMP Packs. A primed Flash Pack can be detonated in the Incognita view. It is safe to prime and detonate a Flash Pack under overwatch.
The blast radius is shown in the user interface before priming, and targets within the blast radius are highlighted in green; the radius is measured by Euclidean distance and requires Line of Sight. The blast also makes a noise in a separate radius of 4 tiles. This noise will not trigger Sound Bugs.
Flash Packs can be bought from a Nanofabricator for 900 credits.
Strategy
Flash Packs serve a similar purpose to Flash Grenades and Shock Trap III: knocking out several guards regardless of armor. They are reusable, but due to their extremely long cooldown, cannot be used often during a mission.
One way to use them is to set traps at choke points or interest points. The door to the Security Hub is a good example. When guards start swarming the room, detonate the Flash Pack to give Monst3r an opening for escape.
The opposite approach also works well: Only prime the Flash Pack if the agent gets overwatched, and detonate it immediately. This cannot knock out guards who are far away, but safely thins a crowd so the agent can get into cover or knock a remaining guard out with ranged weapons.