Feature 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. Item Type: Infrared CO2 Meter Product Material: ABS Voltage: 3.7(V) Battery Type: Lithium Battery (Shipped with Built in Battery) Battery Model: 103450 Battery Capacity: 2000mAh Features: with Alarm Function Indoor 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: HH CO2 Measurement Range: 400PPM to 5000PPM Weight: Approx. 212g / 7.5oz Package List 1 x Infrared CO2 Meter1 x English User Manual 1 x USB Data Cable Note Ships with built in battery.