TL-2000 LCD CO2 Detector Monitor for CO2 Temperature Humidity Atmospheric Pressure Item Type: CO2 Detector Material: ABS Carbon Dioxide Range: 0-9999 (Over Scale) Accuracy: ±50ppm Reading ±5% (0-5000) Response Time: 10 Seconds Temperature Range: -10-70℃ (14-158℉) Resolution: 0.1℃/℉ Accuracy: ±0.6℃/℉±0.9 (0-50℃/ 32-122℉), Others ±1.2℃ Humidity Range: 0-99.9% Resolution: 0.1% Air Pressure Range: 10-1100hPa / 1-110kPa / 0.29-32.48 InHg / 0.15-16.00 Psi Resolution: 1Pa / 0.1kPa / 0.01 InHg / 0.01Psi Data Record: 9144 Groups Working Conditions: 0-50℃, 0-95%RH Storage Conditions: -20-60℃, 0-99%RH Screen Size: Approx. 120x70mm / 4.7x2.8in Storage Box Size: Approx. 250x205x68mm / 9.8x8.1x2.7in Power Supply: 4 x 1.5V AA Battery (Battery Not Included) or the first output 5V AC adapter Product Size: Approx. 160x122x28mm / 6.3x4.8x1.1inWeight: Approx. 881g / 31.1oz How e: Get the product, install the battery (not included), and then use it; the user can adjust the use of multiple functions. There are multiple buttons on the back of the product, from top to bottom; from left to right: 1. Switch temperature unit: ℃ / ℉ 2. Switch atmospheric pressure: hpa, kpa, inHg, PSI 3. Data hold button 4. Maximum/minimum reading function 5. Non-automatic shutdown button 6. REC button 7. Record button 8. Power button This product can also be connected to the supporting 5V AC adapter for charging without installing a battery; when recording multiple data, the CD can be used, and the computer side operation is required. First use the USB data cable to connect to the computer, and the computer side needs to download the connection Timely software application can be matched with the carbon dioxide instrument, and the data can be exported after successful connection. The connection steps can refer to the manual, there are detailed operation steps.