The Trigger Flashlight Stun Gun(FSG) carries a 75 million volt stun when you press the unit against the arm, hand, neck or body of the attacker and press the long red colored trigger button as you hold the unit in the palm of your hand. On the other side of the unit is the 3 position switch. The first position is the OFF which acts as a safety. The second position will activate the flashlight which can be used to light up the area you are walking in and if shown in the eyes of an attacker temporarily blind him. The third position activates the stun when you press the red trigger switch. The flashlight is 100 lumens. The unit has a wrist strap and disable pin. If the pin is pulled from the unit the flashlight will still work but the stun will not. This is an added safety feature for yourself and for any young children who find access to the unit. The unit does not require any batteries. You plug the unit into any house electrical outlet. The red light will turn green when the unit is fully charged. The unit comes in several colors, black, blue, green, pink, purple and red. The unit is guaranteed for life by the manufacturer. If you have a problem with it, please contact me to arrange a replacement