Features: 1¡¢Carbon dioxide detector with high accuracy and stable performance, short response time. 2¡¢3.2?inch full color TFT display, can show date, time, CO2, humidity, temperature (¡æ/¨H switchable) and other information. 3¡¢Professional grade detection technology, built?in sensor, support real time CO2 monitoring. 4¡¢The detector will alarm you once the CO2 is exceed the setting value to ensure your safety. 5¡¢Store up to 999 sets of data and have historical data trend charts for you to view. 6¡¢Comes with rechargeable lithium battery, also can be powered by 5V USB cable. Compact size with portable storage box, easy to operate and carry. Item Type: CO2 Detector Material: ABS Plastic Input: (USB) 5V, 2A Measuring Range: 0-9999PPM Resolution: 1PPM Accuracy: ¡À40PPM¡ÀRdg10% Temperature Measurement Range: -10-60¡æ (-14-140¨H) Temperature Measurement Accuracy: ¡À1¡æ (¡À2¨H) Temperature Resolution: 0.01¡æ/¨H Humidity Measurement Range: 0-100%RH Humidity Measurement Accuracy: ¡À3%RH (20-80%RH) Humidity Resolution: 0.01%RH Operating Temperature Range -10-60¡æ (-14-140¨H) Working Humidity Range: 0-99%RH Storage Temperature Range: -40-80¡æ (-40-176¨H) Working Current: 90-300mA Charging Time: 3 Hours Power Supply: 1Pc 3.7V, 2600mAh 18650 Rechargeable Lithium Ion Battery/Powered By 5V USB Cable Record Group: 999 Set 1 xDetector 1 x Data Cable 1 x Bracket 1 x Manual 1 x Tool Box