... and Explosive Portable Multi-Gas Detector for CO, H2S, O2 and LELFEATURES* Color LCD Display* Self-Test Function* Displays ... Durable Rubber Casing Provides Anti-SlipHandleability* Detects CO, H2S, O2 and Combustible Gas* Rechargeable* Applying for ATEX approvalSPECIFICATIONSRange:CO: ... 0-1000 ppm O2: 0-30% by VolumeH2S: 0-100 ppm LEL: ...