1.5 million volts of electrical energy is released by this stun gun. It is spring loaded and can deploy and zap from a distance of almost two feet. A flash light is mounted on top and a loud siren is added to ward away anything. The siren is just about as loud as you can stand. If you are attacked and in need of help, this siren will be noticed. Note: Remove the small, black, rubber stopper to operate the flash light and siren. Overall Length: 21.25 Inches. Voltage: 1.5 Million. Power Source: Ni-Ca Battery, Rechargeable. Construction: ABS, Insulated, Alloy. Features: Spring Deployed, Safety Switch, Flashlight, Siren. Includes: Holster, Belt loop, 110 V Wall Charger.