The Wolo 496 is a powerful hand held electronic horn. With a simple press of the trigger button, E-Z Horn emits a powerful ear piercing alerting sound. Ergonomically designed, the handgrip is comfortable to hold and is non-slip. A standard 9-volt battery powers the horn, (not included). The E-Z Horn also has a spare battery compartment that can store one 9-volt battery as a backup, assuring the user of always having a working horn when needed in any emergency condition. No expensive cans of gas needed. Comes with a quick release, stainless steel belt clip, simply press the tab on the belt clip, E-Z Horn is released and ready to use. A nylon hand lanyard hand wrist strap is also provided to ensure a positive handgrip in the toughest environment.