SOS SOS 12 SIREN OPERATED SENSOR, W/RESET COMES WITH TEST DISC.

The SOS 12 Siren Operated Sensor opens gates for emergency vehicles when it hears the siren yelp for about 3 seconds. Responders do not stop to enter a code or use a key. Power is 9-30 VDC or 9-16 VAC. It draws 0.1 mA listening and 25 mA when triggered. The front-facing microphone sits in a NEMA 4 enclosure with large internal gaskets. Sensitivity is set with a dial (setting 3 triggers at 125 dB, 9 at 80 dB). Switches set the trigger sound and the hold time: one vehicle, 15 minutes, or latched until reset. Reset buttons are outside the enclosure and on the board. The enclosure adapts for post mounting. What's Included SOS 12 sensor Siren yelp test CD Reflective sign (4 x 5 in or 8 x 10 in) Before You Order Wire: 18-22 AWG stranded, not included. Operating range: -30 to 120 °F. Check local fire department requirements for emergency gate access.