Flashbang, also known as blinding bomb, is a lightweight non lethal weapon that uses strong light to obstruct the target's vision and noise to obstruct the target's hearing. It belongs to a type of throwing weapon. After being thrown, a flash bomb will produce a dazzling light within seconds, which can cause the target to temporarily lose sight. At the same time, it will also generate a huge noise of 170-200 decibels, causing the target to temporarily lose hearing. The principle is to burn magnesium or potassium after throwing to produce dazzling and dizzying light. Due to the fact that flash grenades do not produce aggressive damage fragments during explosion, they are widely used by special police to rescue hostages and other incidents.