Air Quality Monitor Operating Humidity: 0-90%RH Color: White Material: ABS+LCD Battery Capacity: 900 mAh Gas Detection: Carbon Dioxide (CO2) Charging Port: Type-C Operating Temperature: -10 to 50 ℃ Size: 80*53*18(mm) Weight: 150 g Sensor: NDIR Infrared Operating Voltage: 3.7V DC CO2 Detection Range: 400-5000PM Brand new and high quality. This CO2 monitor detects real-time CO2 concentration. It features an intelligent early warning system, a high-quality infrared NDIR sensor, and multi-interference prevention. Its compact and lightweight design makes it portable and easily carried as an accessory, allowing you to monitor air quality anytime, anywhere. The full-color LCD screen displays clear numbers for easy data interpretation at a glance. The built-in 900mAh rechargeable USB battery offers a long 12-hour working time after just a 2.5-hour charge. Suitable for homes, schools, offices, travel, indoor and outdoor use, agricultural planting, and production warehouses. Package Includes: 1 x Air Quality Monitor Note: 1. Please allow slight errors due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.