Mini Air Quality Monitor: Compact and portable design allows it to be carried easily, suitable for monitoring air quality anytime and anywhere. CO2 Detector: Features a built-in high-performance CO2 sensor using professional infrared optical technology for accurate and rapid carbon dioxide detection. Provides an alert when CO2 levels exceed 1000ppm. USB Rechargeable Battery: Equipped with a built-in 700mAh rechargeable lithium battery. Application Areas: Suitable for home, office, agricultural planting, greenhouse vegetables, production warehouses, and raw material processing environments. CO2 Concentration Measurement Range: 400-5000ppm Display: LCD screen Battery Capacity: 700mAh lithium battery Charging: USB Type-C Color: Black Material: ABS Size: 85 x 50.6 x 17mm Package Contents: 1 x Air Quality Monitor 1 x USB Cable Note: The package includes only the items listed above. Other products are not included. Note: Lighting effects and display settings may cause slight color variations between the product image and the actual item. Measurement error is +/- 1-3cm.