The Triple Self Defense System on the Black Jack Stun Gun includes illuminating the area with the flashlight first. If that fails to make your attacker flee, you then can sound the 120dB security alarm to summon help and scare off the attacker. If the light and the alarm doesn't get rid of them then use the stun gun mode by squeezing the sides of the unit and use it on your attacker. To prevent accidental discharge of the stun gun, the pin can be kept separate from the unit preventing the stun gun from going off if a child gets the unit and squeezes the sides. When the pin/wrist strap is in the unit and someone attempts to disarm the unit, the wrist strap remains on your wrist rendering the unit inoperable. In this case, the attacker will not be able to use the stun gun against you. Charging the unit has never been so easy. It has a built-in charger plug. All you have to do is plug the unit into a standard wall outlet and charge it.