0.5-ounce, three-in-one pepper spray keychain is convenient, compact personal security device * Twist-up top makes it quickly accessible when needed; spray formula and canister have been rigorously lab tested for effectiveness and leak-proofing * While spraying, releases invisible, UV-detectable dye, enabling law enforcement to identify assailant, even if he or she attempts to wash off the substance * Guard Dog provides lifetime supply of pepper spray with purchase of this product; see manufacturer website for details * This item is not for sale in certain states