I highly recommend this as sprays with a spray because sprays a mist emissions achieved almost always surrounding people and often obscures the sprayer itself and incapacitating!
Nevertheless, this means may be used only with much caution!
It has been approved in Germany only against animals and should therefore be used only in self-defense against people absolute. From my experience I can confirm that the police after the use of this drug is usually a process initiates for assault against the "sprayer". This will always be clarified in each individual case with the prosecutor continued. All I know procedures were adjusted retrospectively. Nevertheless, this means is not a toy!
Anyone who wants to learn more to this spray directly from the manufacturer, should look for the website of Ballistol. Unfortunately, I can not link directly the URL here.