4 in 1 Multi Gas Detector for O2 H2S CO Combustible Gas Leak Detection Portable Gas Meter with Alarm Oxygen Hydrogen Sulfide Carbon Monoxide Tester Product Name: ADKS-4 Gas Detector<br> Measuring gas: oxygen carbon monoxide hydrogen sulfide<br> Display error: less than equal 5%<br> Response time: TLess than 30s<br> Indication : LCD displays real-time data and system status<br> LED, sound, vibration to indicate alarm, fault and undervoltage<br> working environment:<br> Temperature: 20Celsius~50Celsius;<br> Humidity: Less than 95%RH without condensation<br> Working voltage: DC3.7V (Lithium battery capacity 2000mAh)<br> Charging time: 6h~8h<br> Standby time: more than 8 hours<br> Protection class: IP65<br> Size: 130x65x45mm<br> Weight: about 0.5kg<br> Colour:orange<br> Material: ABS<br> Package Contents:<br> 1 x Multi Gas Detector<br> Only the above package content, other products are not included.<br> 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.