Features: Accurate Test: It can accurately and quickly monitor the indoor CO2 concentration, thus protecting your for health. It can also test indoor temperature and humidity in real-time. Real-Time: With newest electrochemical sensors for more accurate and rapidly measurement, it can help you get the real-time insight about indoor air quality to help you take some actions. Stable & Durable : Built-in rechargeable battery can monitor the air quality for a long for time continuously. Clear screen display and three-color LED indicator can help you clearly identify the air qual Widely Application: It is for ideal for monitoring air quality in for cars, rooms, schools, office buildings, greenhouses, factories, hotels, hospitals, especially the places with babies, kids, the elderly an Portable & Lightweight: With 2.76x3.15x1.38 inches size, stylish exterior and durable materials, this air quality meter is compact and very easy to carry and can be used for a long for time. Specifications: Specifications: Material: ABS Size: 70x80x35mm / 2.76x3.15x1.38 inches Common Screen display CO2 Technology : infrared ( NDIR) Detection range: 400-5000ppm Weight:150g Time: 24 hours real for time monitoring Power supply:Rechargeable Li-battery 1000mah Temperature unit between Celcius and Fahrenheit Switch Note: Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: Package includes: 1x Main Unit+ manual+charging cable