Imagine being able to generate the same amount of noise as a passing train….in the palm of you hand. Now it a reality with the Deaf Leopard. This unit is designed to get attention. Whether used in arena sports, parades, or concerts this unit performs. The volume is easily user adjustable and operates off of a standard CO2 cylinder.(included with the unit) *This unit generates a high decibel level. Hearing protection is required and supplied. * NOTE ALL CO2 canisters are shipped EMPTY. You will need to source CO2 locally before operating your launcher.