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. 1 x Air Quality Detector (Battery Included)1 x Manual1 x USB Charging Cable 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 50℃Humidity 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