Specifications:Brand newColour: Black,White (optional)Size: approx. 90 *70 *30mm / 3.54 *2.75 *1.18 inchScreen: 2.8 inchScreen type: LCDCO2 detection range: 400-5000PPMSensitivity of carbon dioxide detection: 1PPMTemperature measurement range: 0 ~ 50level totalAccuracy of temperature measurement:1777 in total; 1level in totalHumidity measurement range: 0% ~ 99% RHInaccuracy of humidity measurement at the level ofCharging modes: TYPE-C 2VBattery: Built-in lithium battery 1200mAhFeatures: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 detector1pc x data cable1pc x manual