... sound vibration alarm, overrange, alarm against insufficient quantity of electricityResponse time(CO, H2S, SO2, CL2, NO, CLO2, NO2<60s), (HCN, NH3 ... °C~40°CPower supplyRechargeable lithium battery, continuously work for over 24 hoursBattery4.2V lithium battery, 1700mA/h capacity Dimension100×60×30 ...