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. work with our burglar alarm panel, so the alarm panel automatically
dial up the alarm phone. 3) siren:>90db 4) strict method with good quality
