New and improved siren operated sensor. Allows entry of emergency vehicles through gates, the siren activates gate opener while all other sounds are rejected. 

Features:
•    New and improved siren operated sensor
•    Easy and effective emergency access
•    Makes all gates 911 accessible
•    No codes or keys required
•    Compatible with all gate/door operators
•    Comes with a 4x5 inch reflective sign
•    12-24VAC/DC; 2-wire
•    6.5" (h) X 4.125" (w) X 2.25" (d)