CH-50 stun gun generates an awesome output of arcing electricity far beyond what one would expect from such a small handheld item. Plenty of power to bring any assailant to his knees with continuous contact of a few seconds. Will shock through clothing due to its extremely high voltage. The Cheetah Stun Gun is designed with included disable pin to ensure the stun gun cannot be used against you. Proper usage requires you have the disable pin cord wrapped around your wrist so if the stun gun is taken from you, the gun will not work.The stun gun is encased in a rubberized coating to ensure a good grip and long life. No batteries needed, they are already built-in. The charger is also built-in so there is no cord to lose. The recharging prongs just slide out and you can plug the unit into a convenient wall socket to recharge. Dimensions are 4.25 inches long and 2.25 inches wide.