A flash grenade, also known as a stun grenade or a flashbang, is a non-lethal explosive device used to temporarily disorient and blind an opponent. It is primarily used by law enforcement and military forces for crowd control, room clearing, and hostage rescues. The flash grenade produces an extremely bright light and a loud noise, which can cause temporary blindness, deafness, disorientation, and confusion in the target. The effect typically lasts between five and ten seconds, giving the user an advantage to subdue or neutralize the target. Flash grenades are designed not to cause permanent damage or injury, but they can pose a risk if used improperly or in close proximity to the target.