Dahua DHI-ARD311-W door opening sensor
Wireless door opening sensor DHI-ARD311-W, alerts when the door moving from 25-40mm will sound an alarm that scared intruders panic, the distance to the central device is up to 700m, age battery life up to 3 years, high quality ABS plastic cover.
Dahua DHI-ARD311-W door opening sensor feature
– Wireless door opening alarm sensor (magnetic switch), alert of 25-40mm motion.
-The distance to the central equipment is up to 700 meters.
-Support 3 years battery life.
– High quality ABS plastic cover.