Specifications: Brand new Colour: Black,White (optional) Size: approx. 90 *70 *30mm / 3.54 *2.75 *1.18 inch Screen: 2.8 inch Screen type: LCD CO2 detection range: 400-5000PPM Sensitivity of carbon dioxide detection: 1PPM Temperature measurement range: 0 ~ 50level total Accuracy of temperature measurement:1777 in total; 1level in total Humidity measurement range: 0% ~ 99% RH Inaccuracy of humidity measurement at the level of Charging modes: TYPE-C 2V Battery: Built-in lithium battery 1200mAh Features: 3-in-1: Can act as a carbon dioxide concentration detector, thermometer and hygrometer simultaneously. Built-in 1200mAh lithium battery, use TYPE-C charging cable to charge it. Colour screen: the current CO2 data, temperature and humidity. The coloured ring changes depending on the carbon dioxide content. Press and hold the "On-Off" button for three seconds to switch on and off. It automatically detects the carbon dioxide2. Fine workmanship and stable performance. More accurate and reliable. Easy to operate. Long service life. Scope of delivery: 1pc x carbon dioxide detector 1pc x data cable 1pc x manual