The FBG4 is an expendable one time use distraction grenade that is great for training, pest control and other tasks. It’s commonly used for training in air soft, paintball, law enforcement and military training where cost needs to be factored. This pull pin grenade has a 3.5 second delay after the safety spoon is released. The decibel rating is 120 + depending on environment. Used indoors it will be much louder. Proper precautions must be taken. User accepts all responsibility Price is firm at $100 firm for a box of 6 grenades. Quantity is limited.