Description:Brand newColor: White, Black (Optional)Size: approx. 90*70*30mm/3.54*2.75*1.18inchScreen: 2.8 inchesScreen type: LCDCO2 detection range: 400-5000PPMSensitivity for detecting carbon dioxide: 1PPMTemperature measurement range: 0 ~ 50 level in totalTemperature measurement accuracy: 1777 total; 1 level in totalHumidity measurement range: 0% ~ 99% RHHumidity measurement inaccuracy in the amount ofCharging Modes: TYPE-C 2VBattery: Built-in 1200mAh lithium batteryFeatures:3-in-1: Can act as a carbon dioxide concentration detector, thermometer and hygrometer at the same time.Built-in 1200mAh lithium battery, use TYPE-C charging cable to charge it.Color screen: the current CO2 data, temperature and humidity. The colored ring changes depending on the carbon dioxide level.Press and hold the "On-Off" button for three seconds to turn on and off. It automatically detects the carbon dioxide2.Fine workmanship and stable performance.More accurate and reliable.Easy to handle.Long lifetime.Package Included:1pc x Carbon Dioxide Detector1pc x data cable1pc x manualNotice:Due to manual measurement, please allow 1-5mm size error.Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.