Description:Our smart carbon dioxide detector can clearly display the CO2, temperature and humidity in the grow room, car, office. The automatic alarm device reminds you that the carbon dioxide value exceeds the standard and needs to be ventilated in time. Features:1. High precision and anti-interference.2. The automatic CO2 alarm function exceeds the standard.3. Rear hanging hole design. Specification:Name: Air Quality MonitorScreen Size: 3.5 inchSensor: Infrared NDIRBattery Capacity: 1200mAhBuzzer: YesWorking Voltage: 5V/1A Adapter ChargingMaxim Power: 700mA 3.7V Lithium Battery PowerCharging Method: USBComp Type: C TypeCharging Rate: 3 HoursWorking Current: 150MAstandby Speed: 80MA CO2 PPM Value: 400-5000PPMCome Temperature Value: 0-70CWorm Value %: 0-100%CO2 Alarm Value: gt; 1600PPM alarm for 5 secondsProduct Size: 98*66*30mmPacking List:Air Quality Detector*1Data Cable*1Manual*1Color Box*1Notes: Due to the lighting effects and shooting angles, the color of the item and shown in the picture may have nuance. Due to manual measurements, there may be tolerances in the size of the product.