Fast Refresh Real-time CO2 readings updated every second. Faster detection speed, stable measurement values, and more accurate air quality assessment. Function Monitors and displays ambient CO2 concentration, temperature and humidity to help you understand the environment and respond accordingly. Data Display Easy-to-read parameters on a smart color screen. Color cues alert you when air quality needs attention, making status easy to interpret at a glance. Convenient Charging Type-C charging interface with a built-in 1200mAh rechargeable battery. Standby time 240–360 minutes. Wireless monitoring for flexible placement and practical use. Applications Home and living spaces: keep the air comfortable and ventilated in living rooms, bedrooms, or kitchens. Office and meeting rooms: monitor CO2 levels to maintain alertness and productivity during work or discussions. Classrooms and labs: track environmental conditions to support learning environments and experiments. Notes Compact and portable design suitable for desktop or mobile use. No compromise on performance, delivering timely data to support healthy indoor environments.