The Flashbang is a item that can only be spawned from a Killer Box.
The Flashbang looks exactly like a Flashlight, with the only difference being that after a set amount of time, it'll emit a medium-sized explosion along with a loud bang, causing all players to be caught in the blast range to be knocked out for 20 seconds.
The Flashbang can be used by both Innocents and Killers alike, although Killers will be able to identify if they're holding a Flashbang or not.
Killers cannot be affected by the Flashbang.