... gas,H2S, CO, O2Accuracy:≤±5%F.S.Response Time:≤30sIndication:LCD displays real-time and system status;LED;audio and vibration alert for gas ... ~50,95%RHno dewPower Source:DC3.6VLi-on battery,1800AhCharging time: ≤6hWorking time:≥8h continuously(without alarming)Gas Sensor Life:2yearsExplosion-proof ...