Go ahead and read all the stun gun reviews online and you will find that MORE IS BETTER! TWICE the contact -- totaling 1.2 Million Volts -- TWICE the stopping power! The Double Trouble stun gun is more effective than most stun guns because of the space between the contacts and since it is a high voltage stun gun. The greater the space, the greater the effect. Most high voltage stun guns only have 1.5 inches. The Double Trouble has 5 inches between contacts. Rubber Coated Soft Contour Grip to make it easy to hold and hang on to. Safety switch is on the top with a red LED on/off indicator to let you know if the stun gun is ready to fire. Uses two CR123A batteries (included). Also comes with a hand strap and FREE Nylon Carrying Case with Belt Clip ($15.00 Value). Only 6 long. Weighs just 6.9 oz.