Real time CO2 readings displayed on a colorful backlit screen. The visual changes help you quickly see how your indoor air quality is evolving. Built in 1200 mAh battery with USB rechargeability. Long lasting power for continued monitoring without frequent recharging. Simple operation with automatic CO2 detection. Hold the on/off button for three seconds to activate, providing an easy and reliable way to start monitoring. Compact and portable design. Lightweight enough to move between rooms or take on the go, yet sturdy for everyday use. Suitable for homes and offices. Keeps you informed in environments where clean air is important for health and comfort. Use scenarios In kitchens, living rooms, or bedrooms to monitor indoor air and respond to elevated CO2 levels during meals, gatherings, or rest. In home offices or shared workspaces to maintain air quality during work or study. On the move between rooms or while traveling to track air quality wherever you go. Key attributes Function: CO2 concentration measurement with a backlit display Compatibility: standalone indoor air monitoring device for homes and offices Size: compact and portable Battery and power: built in 1200 mAh, USB rechargeable Performance: automatic CO2 detection with easy activation for reliable monitoring