Discover the LiftMaster SOS 12 Siren-Operated Sensor, the ultimate solution for seamless emergency access. This innovative vehicle detector opens gates automatically upon detecting a 'Yelp' siren for 3 seconds, ensuring rapid entry for emergency responders without the need to exit their vehicle or enter codes. It includes the sensor, a reflective sign, and a CD recording of the 'Yelp' siren. Designed with a discreet NEMA 4 enclosure, it features enhanced internal gaskets for added protection and an up-front microphone for quicker detection. Make your gates 911 accessible with the latest in electronic design. Don't wait, secure your property's emergency access today!