The ZAP Blast Knuckles is the ideal protection for walkers and joggers. Carry it on you by fitting it around your hand and have it handy when you need it. Its contoured rubber-coated action grip handle prevents the stun gun from slipping out of your hands, allowing you to maintain a firm hold even during an attack. The safety switch is easily turned on with your thumb for fast activation. The unit also comes with a red LED light to notify you when the charge is on and help prevent accidental use. Product package includes two (2) 3V lithium batteries and a nylon carrying case.