This product is a MINI carbon dioxide detector, which can detect carbon dioxide Temperature and humidity display and intuitive carbon dioxide alarm function display Temperature unit between Celcius or Fahrenheit Switch Different colors represent different concentrations of carbon dioxide It can be monitored 24 hours a day It has a 1600 mAh lithium-ion battery and can be recharged from USB Product specifications: Product Name CO2 Meter Material Common Screen display Size 96*33MM Sensor type infraredNDIR Measure Components CO2 Power Supply 1600mAh lithium battery rechargeable Usage Indoor /in car /new house /bedroom Certificate CE ROHS Warranty 12 Months Detection range CO2 : 400-5000 PPM More details: Material: ABS Color:Black Product size:70*80*35MM weight:150g what are included Main Unit+ manual+charging cable Packing :20pcs/ctn, Carton size : 540*260*400mm G.W10.5KG