TASER's Simulation Air Cartridges are self-contained devices that have 21 feet of range but fire non-conductive nylon wire leads and shortened barbs. The non-conductive wire prevents electrical energy from dispersing into the student while the shortened probe prevents penetration of the simulation suit. Note: The TASER is still live and can stun in touch-stun mode without the cartridge. The cartridge is distinguishable from regular cartridges because it is colored blue. Each is serialized and contains small canisters of compressed and inert nitrogen that fire when the TASER system is deployed.