HIGH PRECISION MONITORING - Professional 5 in 1 air quality meter includes advanced sensor and recognition algorithm to accurately measure HCHO, CO2, TVOC, temperature and humidity data, low error, learn easily to know the air quality around you. LCD DISPLAY AND ALARM - The air quality monitor is equipped with a large, colorful LCD display, clear to read even in dark environment . The color bar would be changed in real time when the detected concentration values vary, alarming users with the color change. HIGH PERFORMANCE BATTERY - Our air quality meter with high capacity rechargeable battery Built-in 1200mAh battery to provide longer reading time, USB rechargeable, you can charge the air quality monitor via power bank, power adapter, computer, PC, laptop.< /p> WIDE APPLICATION - Having a healthier home lifestyle, the air quality monitor automatically and accurately detects the concentration of CO2, formaldehyde and TVOC in the air, widely used in the home, car, hotel, apartment, office, cafe, library, outdoor and more. Features: Real-time monitoring and real-time display of carbon dioxide concentration per cubic meter. It can detect and display the temperature and humidity of the environment to help users understand the environment. It is suitable for offices, homes, gymnasiums and other occasions with a wide range of applications. Smart color display, the numbers are clear, easy to identify and read . In alert mode, the user is alerted to the environment by changing the color. It has a long lifespan and can be charged with a USB cable.< /p> Small and portable, easy to carry, does not take up too much space, and can be installed at home. Battery: The battery indicator continues to flash when charging, and it takes more than 3 hours to fully charge the battery, and the indicator flashes when the battery is fully charged. The battery can be charged for more than 3 hours and can be used for 5-6 hours. Specification: Material: ABS Measuring accuracy: 1ppm Measuring range: 400-6000 Operating voltage: 3.7 V Current: 120 mA Power: 0.4 W Battery: 3.7V, 1500mAh Size: 89*70*35mm Weight: 142 g packing list: 1 * CO2 detector 1 * USB cable 1 * manual Color: Black Quantity delivered: 1 piece