200,000 volts! Need we say more! This is one bad stun gun. We have never had any problems with these. They are very dependable and strong.  Features on-off safety switch, belt clip, and easy detachable wrist strap for joggers.  Requires two common 9-volt alkaline or rechargeable batteries.  Low battery drain (compared to others).  Dimensions are 5-1/2" X 3" X 1".  Safe, effective and non-lethal self-defense.