The application of the carbon dioxide detector is public construction sites, agriculture, animal husbandry, industry and more. This CO2 meter with professional detection technology provides stable performance and high accuracy. 3.2 inch TFT colour display for date, time, CO2, humidity, temperature (/ switchable) and other data. Real-time CO2 monitoring thanks to the high-precision sensor that alerts you as soon as the CO2 exceeds the set value. Can store up to 999 data groups and has a history data chart that you can review. Features: Date, time, CO2, humidity, temperature (/ switchable) and other data of the 3.2 inch TFT full colour display are clear. Real-time CO2 monitoring by the high-precision sensor that alerts you as soon as the CO2 exceeds the setting value. Can store up to 999 data groups and has a history data trend chart that you can review. Specifications: Type: Ordinary Version / Upgrade Version (optional) Material: ABS Input: (USB) 5V, 2A. Measuring range: 0~9999PPM Resolution: 13 o'clock Accuracy: 40PPM rdg10%. Temperature measuring range: -20 ~ 60 C (-4 ~ 140 F). Temperature measurement accuracy: 1C ( 2F). Temperature resolution: 0.01 / Humidity range: 0 ~ 100% RH Accuracy of humidity measurement: 2% RH (20 ~ 80% RF). Humidity resolution: 0.01% RH Working temperature range: -10 ~ 60 C (-14 ~ 140 F). Working humidity range: 0 ~ 99% RH Storage temperature range: -40 ~ 80 C (-40 ~ 176 C). Working current: 100~300mA Charging time: 3 hours Power supply: 1 x 3.7V 2200mAh rechargeable Li-ion battery or powered by a 5V USB cable Data groups: 999 groups Screen size: 65 x 48 mm / 2.56 x 1.89 inches Storage box size: 252 x 206 x 70 mm / 9.92 x 8.11 x 2.76 inches Item Size: 140 * 134 * 33mm / 5.51 * 5.28 * 1.30in Item Weight: 301g Package weight: 871g Package size: 26.5 * 21.7 * 7.2cm / 10.43 * 8.54 * 2.83 inches