Description:(skype:mandyjj1) 1)Alarm mode: Give an alarm warning while Alarm density reaches: Coal gas: 1000~5000ppm, LGP: 1000~5000ppm, natural gas: 1000ppm~5000ppm 2)Working mode: independent & compatible mode: work solely at party ,room etc... - Update: 2007-07-31

Carbon Monoxide Detector (ABS-23) (skype:mandyjj1) It can be used independently to alarm,or can be used with the system to send the sign to the main panel.self-detecting, no wrong report, and reliability different country, different power. Po... - Update: 2007-07-31