I remember the first time that I saw the double trouble stun gun, I thought why hasn't anybody else thought of this? The stun gun fits into your hand very naturally because of its contoured finger grip. Instead of one set of probes it has two so it's actually twice as effective in conducting the electrical charge needed to disable an assailant. The 1.2 million volts that it puts out is plenty strong and since it comes from two different places approximately 3 inches apart, they can put somebody out quickly. That's why it is called double trouble.