Multi Gas Detector Gas Meter O2 H2S CO LEL 4 in 1 Oxygen Hydrogen Sulfide Carbon Monoxide Combustible Gas Leak DetectorProduct Name: ADKS-4 Gas DetectorMeasuring gas: oxygen carbon monoxide hydrogen sulfideDisplay error: less than equal 5%Response time: TLess than 30sIndication : LCD displays real-time data and system statusLED, sound, vibration to indicate alarm, fault and undervoltageworking environment:Temperature: 20Celsius~50Celsius;Humidity: Less than 95%RH without condensationWorking voltage: DC3.7V (Lithium battery capacity 2000mAh)Charging time: 6h~8hStandby time: more than 8 hoursProtection class: IP65Size: 130x65x45mmWeight: about 0.5kgColour:orangeMaterial: ABSPackage Contents:1 x Multi Gas DetectorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.