Features: 4 Ultra-sharp Spike Electrodes offer extra protection and DNA collection for the authorities Rubber coated with soft contour grip for full control Red LED on/off indicator Perfect for joggers Includes 2 lithium CR123A batteries and heavy nylon case with belt clip ZAP Blast Knuckles offer a powerful stun gun in a compact, easy to control package. The sight and sound of the device merely fired into the air will often be enough to scare away potential attackers. Between the two probes you&';ll see the bright blue flash of electrical current and you&';ll hear the menacing electrical buzz of 950,000 volts. Unit features a built in safety so there&';s no need to worry about accidental discharge. You must activate the safety button before you can press the activator button. A red LED will illuminate when the stun gun is active.