The Valken Tactical Thunder B sound grenade is a CO2-powered sound distraction device; designed to accurately mirror those used by military and law enforcement. Utilizing a single CO2 cartridge (sold separately), the Valken Tactical Thunder B sound grenade is meant to stun or distract an unsuspecting opponent. After inserting a CO2 cartridge, simply pull the pin and lift the spoon. This will break the seal on the CO2 cartridge. The empty shell immediately begins to fill with compressed CO2. Once maximum capacity is reached, the shell will rupture with an approximate 130db BANG!! This sound grenade is sure to make even the strongest of us jump.