He and his partner Sean Simone have invented an iPhone case that doubles as a 650,000 volt stun gun. For safety, users have to flip two safety switches and press an activation button. The company that the college buddies founded named "Yellow Jacket," has sold thousands of the cases since February. The stun gun retails for $139.99, and buyers must be at least 18 years of age. Presently the stun guns are not sold in the U.S.
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