This amazing Guard Dog Security stun gun releases a powerful shock of power from your knuckles. The knuckle provides double power and comes to life with an enfolding Grip. This device has a safety switch to on and slides the unit over your fingers to be ready in an instant to defend yourself with powerful blows. This product will scare off potential assailants and, if that isn't enough, a simple touch can immobilize them. The I do two stun gun has a built-in -LED light in the stun gun for nighttime radiance. Moreover, you don't have to worry about batteries because it powered by an internal battery that rechargeable with the included wall charger. Also, it’s lightweight and compact construction makes it easy to carry with you wherever you go so you are always ready to defend yourself. This product should be charged for 8 hours.