The Blackout 5,000,000* is our most powerful stun gun. Its rubberized coating protects the unit and provides a firm grip. To help this stun gun maintain its maximum power we use superior nickel-metal hydride rechargeable batteries which hold a full charge longer then nickel-cadmium batteries that are used in most stun guns. With the built-in recharging plugs there are no cords to keep up with. You simply plug it into a standard wall outlet. To help prevent overcharging an LED light lets you know when it is fully charged. It also has a built-in bright LED flashlight. The unit comes with a safety switch to prevent accidental discharge. To prevent the stun gun from being used against you we have included a wrist strap with a disable pin that plugs into the bottom of the unit. If the stun gun is taken away from you this pin will pull out preventing it from working (we also include a disable plug for those who prefer not to use this feature). The disable pin adds an additional safety feature for parents; removing the disable pin prevents a child from accidentally turning the stun gun on if they happen to find the unit. A stylish, durable holster is included for easy carrying. Dimensions are 3 and one-half inches x two and one-eight inches x seven-eight inches.