This shock pen will not give lasting effects since it only produces light and harmless shocks but enough to catch anyone off guard. A shocking pen is truly your perfect prank companion everywhere you may go! It has several styles available online too! All you really need is a battery and you are good to go. This pen is also a great prank gift for your loved one or friend who loves to make fun of people just like you! Now what are you waiting for? Why don't you start shocking people and see their faces go awry! It is so funny and so worth every penny that you have spent for this pen.