Attacks the central nervous system, impairs vision, restricts breathing, and causes the nose to fill with mucus and skin to feel like it's on fire - quickly incapacitates attacker. Effective range: 15-20 ft. Stream spray for maximum stopping power, less cross-contamination. Attacker Tracker UV Dye lasts up to 48 hours for law enforcement and victim to identify the bad guy(s). Oil-based 1.4 Major Capsaicinoids (maximum allowed by law) Each Byrna Bad Guy Repellent canister comes with an attachable clip for quick access on belts, backpacks, purse straps, etc. Expiration Date: 4 Years from date of purchase