1. Lithium battery direct charge, durable2. Full-color screen, safe and stable3. High precision and fast detection4. Widely used and easy to operateCO2 detection range: 400-5000ppmCO2 detection sensitivity: 1ppmTVOC detection range: 0-2ppmTemperature measurement range: 0-50CTemperature measurement accuracy: 1CHumidity measurement range: 0-99%RHHumidity measurement accuracy: +2%RHUSB DC5V Type C supply: DC 3V or AAA 1.5Vx2PC (not include)Material: plasticcolour: black+whitePackage Contents:1 x CO2 MeterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.