Shotgun Shell Weapon
While this device may not look like a weapon, it is actually quite deadly. Hidden behind walls and ceilings to blend with the architecture, it shoots 15 shotgun shells when activated.
The weapon can be deployed remotely, and requires a series of authentications before it can fire. While it has been installed in homes outside the U.S., Safe said it does not use the device anymore in the houses it secures.
Next: A shelter from nuclear, biological and chemical attacks. (Or you can go to CNBC.com to see even more protection measures of billionaires.)