Stun Master SM-100C Stun Master has been a leading brand in the stun gun industry since 1994 making it a true icon in the world of self-defense. This type of success for so many years in a competitive field is the finest recommendation any product could be given. All Stun Master models have safety switches (except Stun Batons) and wrist straps. Stun Masters shown above use two 9-volt Energizer Eveready Alkaline batteries (except 100,000 volt which uses one). The Stun Master has a Lifetime Warranty.