Valken Thunder V Sound Distraction Devices Designed to mimic sound distraction devices used by military and law enforcement personnel, these reusable sound devices create a loud bang in order to distract your enemy allowing you to get the drop on them. These devices use 12g co2 cartridges and one time use burst shells to produce such a loud bang. 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”! Kit Includes: -12 Dumbbell Grenade Shells (Core included)