... : Portable (CO,H2S,O2,LEL)M40 multi-gas monitor with pump M40 SPECIFICATIONS: Size: 4.30" x 2 ... grams)11.5 oz. with SP40 (326 grams)Display: Custom Graphic LCD with Backlight SENSOR SPECIFICATIONS: GasRangeResolutionT90Carbon Monoxide ... CHARGER SPECIFICATIONS: Runtimes:18 hours diffusion, 12 hours with pump Note: Any questions or problems, please feel ... (CO,H2S,O2,LEL) M40 multi-gas monitor with pump