Abstract: An apparatus for detecting the discharge of a firearm and transmitting an alerting signal to a predetermined location. The invention provides for detection circuitry having: (1) a microphone for detecting pre-set sensitivity levels, (2) a measuring means for measuring acoustic energy generated from the discharge of the firearm, resulting in acoustic energy information, (3) transferring means for transferring the acoustic energy information to a digital signal processor, which converts the acoustic energy information into digital format, resulting in digitized binary codes, (4) an analyzing means for comparing the digitized binary codes contained in the digital signal processor with a set of predetermined criteria, (5) a verification process, and (6) an alerting means for transmitting an alerting signal to a predetermined location in the event the digitized binary codes match the set of predetermined criteria.