A. As this five-in-one air quality monitor is significant to individuals, it could be a good choice. It can accurately monitor carbon dioxide, total volatile organic compounds, formaldehyde, humidity, and temperature, allowing you to monitor environmental conditions at any time. B. This air quality monitor is equipped with a chip that responds quickly and is sensitive, capable of accurately capturing the weak current generated during the electrochemical reaction process. The dual-color display and voice alarm functions enable you to conveniently understand the current air quality. C. It has a built-in 1200 mAh rechargeable battery and comes with a 5V USB charging cable. The standby time can reach up to 10 hours, reducing concerns about power shortage. D. The mesh design helps the device dissipate heat better during operation, preventing overheating and enabling more accurate measurement data. E. Color: White F. Material: ABS G. Package contents: - 1 air quality monitor - 1 USB charging cable - 1 English instruction manual H. Only the above package contents are included, and other products are not part of the package. I. Note: Due to light reflection and different monitor settings, the color of the items in the picture may vary slightly from the actual product. The allowable measurement error is +/- 1 - 3 cm.