Feature 1[Large Screen] The large screen displays the battery level, which is clear and easy to read, and the measurement results are accurate. 2[Multifunctional] Using empty semiconductor TVOC sensor, which can measure CO2, temperature and humidity, to meet your various need. 3[Good Heat Dissipation] Enough ventilation holes accelerate the convection between the air and the machine and provide a good heat dissipation effect. 4[Durable Material] Made of high quality plastic and glass materials, which is safe, durable, wear resistant, and can be used for a long time. 5[Widely Application] Carbon dioxide detector is widely used in a variety of situations, such as offices, bedrooms, living rooms, gymnasiums, etc.Item Type: Air Quality DetectorProduct Size: Approx. 9 x 7 x 3.5 cm / 3.5 x 2.8 x 1.4 inMaterial: Plastic + glassResponse Time: <1sTest Temperature Range: 0 to 50Humidity Test Range: 0-99%RHCO2 Detection Range: 400-5000PPMWorking Voltage: 5VMaximum Power Charging Current: 600mABattery Type: Lithium battery (Battery Included)Battery Capacity: 1200mAhCharging Time: 1 hourCharging Method: USB chargingApplication: Homes, restaurants, educational institutions, fitness clubsWeight: Approx. 180g / 6.3oz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x AirQuality Detector(Battery Included)1 x Manual1 x USB Charging CableNotePlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.