A Stun Gun is an electrical self-defense device that uses high voltage to stop an attacker. Touching a person with the prongs on the Stun Gun quickly immobilizes the attacker. However, because the amperage is very low, no serious or permanent injury is inflicted. Stun Guns are designed to key into the nervous system. They dump their energy into the muscles at a different frequency than the pulse waves emanating from the brain. The pulse waves coming from the brain and those from the stun gun collide at the nerve synapse' which is a type of complex processing switch adjacent to each muscle group. The resulting energy collision makes it difficult for an attacker to move and function. This causes disorientation and loss of balance and leaves the attacker in a passive and confused condition for several minutes. Still, stun guns have no significant effect on the heart and other organs. As a general rule, a one-half second contact from a stun gun will repel and startle the attacker, giving some pain and muscle contraction. One to two seconds will cause muscle spasms and a dazed mental state. Over three seconds will cause loss of balance and muscle control, mental confusion and disorientation. However, don't think about how many seconds you should hold the Stun Gun to your attacker. Think about it this way. Throw out what the books say and the online information you have read about Stun Guns. You should hold your stun gun to the assailant until they drop and you can get away and call the police, whether that may be one second or six seconds. The electrical shock that emits from the stunning device will not pass from the person being stunned to the person doing the stunning. The effect is localized only in the affected area and does not pass through the body. S&D red blue and black $75 -Solid Metal Alloy Body 4 Million Volts Output Rechargeable Nylon Carrying Case Included 6 3/4 length VIPERTEK $50 Latest Model - Replaces the PHX-800 Extremely Powerful 15 Million Volts! The VIPERTEK VTS-880 is the Original Mini Stun Gun. Don't settle for weak, inferior knockoffs! 4 Prongs and 2 Spikes For Double Shocking and Penetrating Power Mini Size, Conceals Easily - Only 4-1/4" tall, 2 1/8" wide and 1" thick - Slips easily into a pocket or purse. Built in LED Flashlight & Built in Charger Rechargeable Battery - No expensive batteries to buy Safety switch prevents accidental discharges Lifetime Warranty Stun master $65.00 The Stun Master 8.5 Million Volt Rechargeable Stun Gun with Flashlight is an ultra thin stun gun with a mean bite. It's about the size of a small electric shaver and comfortably fits in small hands. The safety switch is located on the side of the stun gun and has three positions: off, flashlight only and stun gun only. The activating switch is the round, red button just below the flashlight. This stun gun has a built-in nickel-cadmium rechargeable battery and comes with an easy to use integrated charger. Simply plug the charger into the stun gun and then into an electrical outlet. The LED charge light will turn on. The stun gun may have a small charge when it arrives but you will need to charge it for 4 hours. After the initial charge and long periods of inactivity we recommend recharging the stun gun for 2 hours. Dimensions: 5 1/8" x 1 3/8" x 1 1/8"