◎ flashing light.
◎ Built-in tweeter.
◎ 2-way communication with alarm control panel.
◎ Can arm/disarm by remote controller.
◎ With tamper alarm.
◎ Can enroll 16wireless devices.
ITEM: MD-313R Alarm Decibel：around 100db
Static current=0.7 mA Alarm current=500mA
Voltage:4.5V Transmit /Receiving distance=80M(OPEN AREA)
Transmit /Receiving frequency 433MHz/868MHz
