Product Name: Portable Multi Gas Detector 4 in 1 Gas Monitor with Micro Clip Gas Analyzer Lel Co O2 H2s Portable Multi Explosive Gas Detector As8900 Model NO.: AS8900 Type: Combustible Gas Detector Gas: H2S Certification: CE, RoHS, Ex Portable: Portable Customized: Non-Customized Brand: Smartsensor Detected Gas: Combustible Gas, Co, O2, H2s Measurement Range: 0-100% Lel, 0~999ppm, 0~30%Vol, 0~500ppm Resolution: 0.1% / 1?mo/Mol(Ppm) / 1% Response Time: <50 Seconds Ow / High Alarm: Yes Power: 3.7V Li-Battery Measuring Principle: Electrochemical Principle Trademark: SMART SENSOR Transport Package: Carrying Case Specification: CE, ROHS Origin: China HS Code: 9027100090 Product Description Features:Large LCD screen display with backlight,even can be used in dark conditionsHigh sensitive import sensor,accurate measurementSound and light and vibration three alarm ways, Adjustable Alarm value can up to 80 dbUser-Friendly design, delicate and easy to use and carryRechargable 3.7V li-battery can be reusedTechnical specification:ItemAS8900 Multi-Gas MonitorGas TypeOxygen, Carbon Monoxide,Hydrothion, Combustible GasMeasuring rangeO²: 0~30% VOLCO : 0~999 PPMH²S : 0~500 PPMCombustible Gas : 0~100% LELResolution0.1% / 1μmo/mol(ppm) / 1%Measuring PrincipleElectrochemical principle, life for 2 yearsLow / High Alarm√Alarm Setting√AlarmSound, Light Alarm. Adjustable Alarm values, Alarm sound up to 80 db.Operating temperature-10~50ºCOperating humidity15%-95%RH (Standard)Power3.7V li-batteryProduct Size120.2*64.5*38.3mmPackingGift boxSrandard Quantity Per Carton24pcsSrandard Carton Size46*45.5*55cm