Just touch your attacker to instantly repel them and give you time to get away. Longer contact will cause further disorientation and after some seconds may drop them to their knees. This patented device has a soft rubber skin and is sized to accommodate all hand sizes. A safety switch is built in and accessible by your thumb. Once you grab the Knuckle Blaster stun gun you can flip off the safety and fire with the same hand. No need to use two hands. Uses 2 Lithium batteries (included). FREE leather belt holster ($15.00 Value) designed to allow quick access and deployment of this amazing stun weapon. One year warranty.