Intelligent wireless gas detector

Model number: ABS-GAS
Intelligent wireless gas detector Description: 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 Description: 1. Operating Voltage:AC220V, or AC110V; DC12~20V 2. Working temperature: -10degree~50 degree 3. Alarm density: Coal gas: 2000ppm+/- 30%, natural gas: 2000ppm+/-30%,Liquid petroleum gas: 5000ppm+/-30%, 5. Operating Frequency: 433 MHZ/315MHZ (optional) 4. Responding time: less than 2 seconds 6. Net Weight: 0.2kg 7.Size: 115mm(L)?1mm(W)?3mm(