Carbon Dioxide Meter The product is shipped based on the color or size of the main image of the product page. Features: When there is no indoor ventilation in winter, you can accurately and quickly test the indoor carbon dioxide for your health by using our carbon dioxide measuring equipment. At the same time, our detector can monitor the indoor temperature and humidity in real-time. It is the best choice for your healthy life With the large LCD screen display and 24 hours real-time monitoring function, you can see the data more clearly at any time, give you a better user experience. The color of the screen changes with the concentration of carbon dioxide and the color changes from green to orange to red, making the air quality more straightforward. The temperature unit can be switched between Celcius (℃) and Fahrenheit (℉), you can choose the one you like. Perfect to be used to monitor air quality in schools, office buildings, greenhouses, factories, hotels, hospitals, laboratories, and anywhere that high levels of carbon dioxide are generated. Specifications: Main material: ABS Color: Black Voltage: 5V Power: 2.5W Battery: Built-in 1500mAh Charging Time: 2-3 hours Standby Time: Continuous 7-9 hours Product size: 88*70*35mm Product weight: 150g Note: *There could be some deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding. Package information: Package Weight: 250g Package size: 14.1*9.8*4.8cm Package list: 1 * Detector 1 * USB Cable 1 * Manual