k to view and copy the previously generated PDF file for conveniently checking and analyzing, also support format the disk. Features: Compact size with a portable storage, easy to operate and to carry around. With professional grade detection technology, this CO2 meter has stable performance, and high accuracy. 3.2-inch TFT full color display date, time, CO2, humidity, temperature(& 8451;/& 8457; switchable), and other data clearly. Real time CO2 monitoring by the high-precise sensors, and it will alarm you once the CO2 is exceed the setting value. Can store up to 999 groups of data, and has a chart of historical data trend for you to review. Support generate a PDF file, connect to a computer, display a disk to view and copy the previously generated PDF file for conveniently checking and analyzing, also support format the disk. Support set the backlight operation time, 1min, 5min, 10min, 30min, 1hour and you also can close backlight. Support set the brightness of backlight, 25%, 50%, 75%, 100%, you can set according to your use habit. Support data clear, support on/off display max/min mode, support set time and data. Rechargeable lithium battery is included, or can be powered up through 5V USB cable. The application field of carbon dioxide detector is public site, agriculture, animal husbandry, industry, and more. Specifications: Name: Carbon Dioxide Detector Material: ABS Input: (USB) 5V, 2A Measuring Range: 0-9999PPM Resolution: 1PPM Accuracy: ±40PPM±rdg10% Temperature Measurement Range: -20~60& 8451;(-4~140& 8457;) Temperature Measurement Accuracy: ±1& 8451;(±2& 8457;) Temperature Resolution: 0.01& 8451;/& 8457; Humidity Measurement Range: 0~99%RH Humidity Measurement Accuracy: ±2%RH (20~80%RH) Humidity Resolution: 0.01%RH Working Temperature Range: -10~60& 8451;(-14~140& 8457;) Working Humidity Range: 0~99%RH Storage Temperature Range: -40~80& 8451;(-40~176& 8457;) Working Current: 180~300mA Recharging Time: 3 hours Powersupply: 1 * 3.7V, 2200mAh battery or powered by 5V USB cable (both included) Record Groups: 999 groups Auto Power Off: apable of being set(default automatic power off time is 15min) Screen Size: 66 * 50mm / 2.60 * 1.97in Storage Box Size: 252 * 210 * 71mm / 9.92 * 8.27 * 2.80in CO2 Detector Size: 140 * 134 * 33mm / 5.51 * 5.28 * 1.30in Item Weight: 673g / 1.48lb Package Size: 270 * 216 * 72mm / 10.63 * 8.50 * 2.83in Package Weight: 822g / 1.81lb Packing List: 1 * Detector 1 * USB Cable 1 * Storage Box 1 * Manual (English) By the way,if you like our store,please add our store to your Favorite Stores.You can get our and Discount information in time.