Size: 500*292*255(mm) Sensor: Infrared Sensor Material: ABS + TFT LCD Screen Charging Mode: TYPE-C Battery Capacity: 1000mAh Humidity Test Range: 0-99% RH Applicable Temperature: -10 to 50 ℃ 100% brand new and high quality Product Name: CO2 Air Monitor Color: Black Measurement Range: 400-5000 ppm Charging Interface: 3.7v Power: 1200mAh rechargeable lithium battery * 3-IN-1 CO2 MONITOR: Utilizes NDIR technology to monitor indoor and outdoor CO2 concentrations (400-5000PPM), humidity (0-99%RH), and temperature (-10-50℃). Data updates every two seconds. * MINI AIR QUALITY MONITOR: Compact and portable with a mini lanyard design for easy carrying or hanging. Features an alarm that alerts you to rising PPM values with increasing frequency (4 alarm levels). * REAL-TIME MONITORING: The mini CO2 meter monitors CO2 concentration in real-time and provides smart alarms based on different CO2 levels. The large full-color LCD screen is easy to read and includes an eye-protection function. Calibrate the monitor for ongoing accuracy. * LONG BATTERY LIFE & ADJUSTABLE BRIGHTNESS: Equipped with a high-capacity rechargeable battery, offering 2 hours of charging for up to 20 hours of standby time. Adjust screen brightness to 3 levels for optimal viewing in different lighting conditions. * PORTABLE & WIDE APPLICATION: Lightweight and compact with an anti-loss lanyard for easy monitoring of environmental changes. Ideal for homes, schools, offices, travel, indoor/outdoor use, agricultural planting, production warehouses, and more. Package Includes: 1 x Air Quality Monitor Note: 1. Please allow for slight errors due to manual measurement. 2. Due to the difference between different monitors, the image may not reflect the actual color of the item.