SMART SENSOR ST8904 Multifunctional Gas Detector Oxygen O2 Hydrogen Sulfide H2S Carbon Monoxide CO Combustible Gas LEL Gas Meter

Battery Included：Yes High-concerned chemical：None With LCD Screen Or Not：Yes Gas Type：Multifunctional DIY Supplies：Electrical Origin：Mainland China Certification：CE

Battery Included: Yes High-concerned chemical: None With LCD Screen Or Not: Yes Gas Type: Multifunctional DIY Supplies: Electrical Origin: Mainland China Certification: CE