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 Intelligent color screen display, clear numbers, easy to identify and read. In alert mode, the user is alerted to notice the environment situation by changing the color. It will alarm more than 1000 ppm. The temperature unit can be switched between Celcius () and Fahrenheit (), you can choose the one you like. Long service life, can be charged with USB cable. Small and portable, easy to carry, does not take up too much space, can be placed on the table or installed on the wall. Perfect to be used to monitor air quality in-home, schools, office buildings, greenhouses, factories, hotels, hospitals, laboratories and anywhere that high levels of carbon dioxide are generated. Specifications: Material: ABS Color(optional): Black/White 3 in 1 detector: Carbon Dioxide / Temperature / Humidity Detection range: 400-6000ppm Accuracy: 50ppm; 5% Precision: 1ppm Power: 0.4W Battery: Built-in 3.7V 1500mAh battery Charging time: 3 hours Working time: 5-6 hours Product size: 94*94*30mm Product weight: 125g 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: 285g Package size: 14*14*4.3cm Package list: 1 * Detector 1 * USB Cable 1 * Installation Tool 1 * Manual