... ,Home Arm ,disarm or panic alarm, convenient and practical.12. Can control the system by calling-in, such as arm ... Standby Current: 80mA Working Current: 300mA Power Supply: DC 9-12 VOperating Temperate: -10°C ~ +40°C GSM Frequency: 900 ... , petroleum, coal, railroad, citizen, police and some other organizations. 2012 newest professional lpg detector active infrared sensor motion sensor home security ...