Description Product Name: Carbon Monoxide Meter Display: LED Measurements: Carbon dioxide, temperature, humidity CO2 Detection Method: Infrared (NDIR) CO2 Concentration Unit: ppm CO2 Measurement Range: 400-5000 ppm Atmospheric Pressure: 12.5 PSI - 15.4 PS (The PS here may be an omission of PSI. Based on the above information, please refer to the actual information for accuracy.) Sampling Time: 1.5 seconds Temperature Range: -10C - 50C Storage Temperature: -10C - 60C Relative Humidity: 20% - 85% Color: White Material: ABS Package Contents: 1 x carbon dioxide detector 1 x USB charging cable Only 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.