[PORTABLE CO2 MONITOR]Spot check indoor air quality anywhere or leave device on for continuous monitoring ,This easy-to-carry air detector can help monitor air quality , kitchen, bedroom, office, school, car, hotel, travel, campingetc...especially in which has baby,child and pregnant woman. [NEW DESIGN]Newest unique mold and design ; it can offer mean value for each gas because long-term monitoring, the real-time data exist instability. Large screen design, clear and easy to see. [EASY OPEARATION]This air monitor is easy to operate with just pressing the functional button, Updated user manual is very simple and easy to understand. The intelligent air tester can monitor the of the environment in a period your care about,You can take it anywhere to monitor air quality. At the same time, you can set a standard value of formaldehyde. When harmful substances exceed the standard, The corresponding area will flash to remind. [Application areas] agricultural planting, greenhouse vegetables, production warehouse, raw material processing, , etc. Large screen design, clear and easy to see. Carbon dioxide 1s/time real-time refresh. High-performance chip is accurate and more outstanding. Functions: carbon dioxide detection, hazard assessment, temperature and humidity detection, intelligent alarm system, gas recognition algorithm, multiple anti-interference, air convection technology, greenhouse compensation calibration. Using more professional infrared optical principles to accurately and quickly detect carbon dioxide. Battery: 1 x lithium battery, 1200mAh CO2 measurement range: 400-5000PPM Accuracy: 1PPM Sensor: CO2 sensor, temperature and humidity sensor (digital SHT20) Temperature accuracy: 0.3 Humidity accuracy: 3% Package weight: 160g / 5.6ounce How to use: One-button start, press the button for 3 seconds to turn on the machine and start testing, no calibration is required. Press the button for 3 seconds, the machine shuts down. Type: Without battery Package size: 92 x 72 x 42mm / 3.6 x 2.8 x 1.7in Material:PVC + ABS colour:White Package Contents: 1 x CO2 detector 1 x USB cable 1 x English manual Only the above package content, other products are not included. Note: Light 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.