Portable Hydrogen Sulphide(H2S) Gas Detector.Single Gas Detector(0-500Ppm, H2S) As Perannexure-1 , Portable Hydrogen Sulphide(H2S) Gasdetector. Single Gas Detector(0-200Ppm, H2S) As Perannexure-1 , Lithium Ion Battery Compatible Withthe Above Items As Per Annexure-1 Quantity: 80