... . Wireless alarm system, no need to set wire and easy to install.Technical Specification: Standby Current: 80mA ... 2pcspower supply, 1pcmanual 1pc For occasions:Villa, shop ,office, hospital,school,library,bank ,street lamp,billboard,farm,orchard,fishpond, ... power, traffic, petroleum, coal, railroad, citizen, police and some other organizations. 2012 newest professional lpg detector active infrared ...