Features: Accurately monitors CO2, TVOC, HCHO, humidity, and temperature. Allows real-time environmental monitoring. Equipped with a fast-responding, sensitive, high-performance chip that precisely captures the weak current generated during electrochemical reactions. Features a 1200mAh rechargeable battery for extended use. Designed for efficient heat dissipation to prevent overheating and ensure more accurate measurements. This air quality monitor is intended for indoor use. For best results, close doors and windows before testing to ensure accurate readings. Allow the device to operate for at least 60 minutes before interpreting the data. Specifications: Component: ABS Type: Black+Blue / White+Blue Size: Approx. 70x35x90mm / 2.75x1.37x3.54 inches Package Includes: 1 x Air Quality Monitor Note: 1. Please allow 1-2 cm error due to manual measurement. Ensure you are comfortable with this range before ordering. 2. Due to differences in display screens, the image may not reflect the exact color of the item.