This is a brand new Flashlight stun gun(FSG). it is 7.5 in. long x 1 7/8 in. . It is made of aircraft aluminum so it will not break. The body can be used as a baton to strike against the face or body of an attacker. When you press the unit againt the arm, face or body of an attacker and press the button it shoots 75 million volts into the attacker. The battery is inside the unit. You plug the unit into a wall socket when the light dims.The unit comes with a holster, wrist strap and an off/on swith. The flashight setting delivers 120 lumens of bright light which could temporary blind an attacker.. Life time warranty for operation. Note when testing the stun, only do it for a second or two. Prolonged testing in the air could void the warranty. Against the body of the attacker there is no time limit.