Features:brand new and high qualityUsing professional infrared sensing detection technology.This CO2 meter has stable performance, and provide high accuracy and fast measurement response.Large LCD screen, clearly show the datas of carbon dioxide, temperatureand relative humidity.Wide application: Suitable for home, public site, agriculture, animal husbandry, industry, and more.With this CO2 monitor, you will know the actual level of carbon dioxide in the room to monitor the indoor air quality.It is importantfor our safety and for health. It can be placed on desktop, light weight and small in size, easy to store and carry.Equipped with USB charging cable, which can be used in special scenarios, such as stations, hospitals, etc.Specification:Product Name:CO2 MeterDisplay: LCDDetection Principle: Infrared InductionPower Supply: USB AdapterVoltage: 3.7VCO2 Measurement Range: 400-5000ppmResolution: 1ppmMaterial: ABSColor: Silver+BlackSize: app. 8x5x8cm(3.15x1.97x3.15in)Quantity: 1 setNote:Transition:1cm=10mm=0.39inchNo retail package.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Packageincludes:1 x CO2 Detector1 x USB Cable(other accessories demo in the picture is not included.)