President Barack Obama's $1.5 million "Cadillac One," aka "The Beast," is one of it's kind in the world.

According to AutoWeek reports, the president has 12 identical limos which work in rotation and, when not in use, they're parked in the basement of the Secret Service's headquarters and are under 24-hour surveillance.

At least two cars travel with the president wherever he goes, and they get a humble 3.7 miles to the gallon. The president's motorcade is surrounded by up to 45 other armed vehicles, including an identical decoy, local police, a mobile communications center, more armed vehicles, and an ambulance.

The cars are manufactured by General Motors in Detroit and have a gasoline V8 engine. The top speed and weight of each car is classified, as is the bulletproof technology used for the windows.

Below are more details of "The Beast" you need to know.

Check out more photos of "The Beast" on the next page.