$1500 Armatix IP1 ships together with a watch – essentially an authentication token that the user must wear for the gun to fire. Separate the two and the firearm no longer works. A hacker going by the pseudonym Plore demonstrated how even the non-technical can hack the gun and fire it without the accompanying watch. New Jersey passed a Childproof Handgun Law requiring all guns sold in the state be smart, in the sense that they would require some form of authentication.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/1500-smart-gun-hacked-15-magnets/