Since 1992, Siren Operated Sensor (SOS) has been providing the original Siren Operated Sensor for opening gates during emergencies in residential, commercial, airport, government, and military settings. The SOS system is used in North America, South America, and Europe, enabling gates, doors, parking arms, barriers, and roll-up doors to open for emergency responders. The system activates in response to the 'Yelp' siren for quick access without the need for codes or keys, making it a cost-effective solution for emergency access. The reliability of the SOS Emergency Access System has made it mandatory in many communities worldwide, emphasizing time-saving and life-saving benefits.