Portable Health Guard: The mini CO2 detector is small and lightweight, serving as a personal air quality monitor suitable for indoor and outdoor environments. High-precision detection: Detection range from 400 to 5000 PPM with high-precision sensors for real-time monitoring of CO2 levels. Clear display: 1.9-inch ultra-high-definition color screen provides clear readings, allowing you to monitor indoor air quality at a glance. Intelligent alarm: Green indicates safe conditions with no alarm; yellow triggers a periodic beep every 10 minutes to alert you to potential air quality concerns. Wide range of applications: Suitable for use in cabinets, kitchens, restaurants, vehicles, homes, and other indoor spaces, helping to detect abnormal CO2 levels. Rechargeable: Equipped with a Type-C charging interface for convenient charging. Color: White Material: ABS Size: 13.8 x 9.5 x 4.7 cm Package Contents: 1 x Mini carbon dioxide detector 1 x English manual Note: Only the items listed are included. Light reflection and differences in display screens may cause slight variations in the product's color as seen in images. Measurement error allowance is +/- 1-3 cm.