1、Multi Purpose: CO2 detector can not only detect carbon dioxide, but also test temperature and humidity, multi purpose, strong practicability. 2、Clear Display: The carbon dioxide detector is equipped with a large screen to make your inspection data clearer and you can easily get the results. 3、Space Saving: The infrared CO2 meter is small enough to use it on your desk without taking up too much desk space, and is also easy to carry. 4、Alarm Function: Indoor CO2 meter has an alarm function, when the detection value is too high, it will automatically alarm. 5、Wide Application: Infrared CO2 detector thermometer is suitable for home, office, hotel or anywhere you want. 1 x Infrared CO2 Meter1 x English User Manual1 x USB Data Cable Item Type: Infrared CO2 MeterProduct Material: ABSVoltage: 3.7(V)Battery Type: Lithium Battery (Shipped with Built in Battery)Battery Model: 103450Battery Capacity: 2000mAhFeatures: with Alarm FunctionIndoor Temperature Measurement Range: 0℃ to  50℃, Error: within 1℃If It Exceeds the Measurement Range, It Will Display: Low End: LL.L℃, High End: HH.H℃Indoor Humidity Measurement Range: 25% to 95%, Error: 5%If It Exceeds the Measurement Range, It Will Display: Low End: LL, High End: HHCO2 Measurement Range: 400PPM to 5000PPMWeight: Approx. 212g / 7.5oz