Removing the canister from the case Smart Case instantly activates an integrated audible alarm and wireless transmitter, capable of communicating with your security system at a range of 2,000 ft, alerting the authorities and your preselected list of contacts via text and/or email. The Threat Extinguisher System also transmits the location of the activated unit so first responders know where to go, and people evacuating know where not to go. Flashing warning light alerts the hearing impaired.