Portable air quality monitor adopts electrochemical sensor with stable performance and high detection accuracy, monitoring CO concentration, temperature and relative humidity in the air. It supports connection to the phone APP via BT, you can view the data within 60 days. Large-screen LCD digital display, real-time monitoring, perfect for home, office, school, warehouse, agricultural planting, etc. Features: 3 in 1: Multifunctional air quality detector real-time monitors CO concentration, temperature and relative humidity in the air. Large digital screen with backlight, clear and easy to read, support alarm function. High Accuracy: Using electrochemical sensor, plus high-performance chip, detection is more accurate, higher accuracy, and the accuracy can reach 1PPM. APP Control: Support to connect to the phone APP via BT, you can read up to 1440 sets of data for 60 days, compatible with iOS and Android systems. Quick Heat Dissipation: With multiple ventilation holes, which accelerate the convection between the air and the detector, to achieve effective detection and provide a nice heat dissipation effect. Built-in Battery: Equipped with 1200mAh high-capacity rechargeable battery, low power consumption and long endurance, no need to replace the battery frequently. Wide Application: Lightweight and portable, it is suitable for home, office, school, warehouse, agricultural planting, etc. No need to calibrate at startup, automatic monitoring. Specifications: Color: Black/ White(optional) CO Detection Ranges: 0-500PPM, 5010%PPM CO Detection Accuracy: 1PPM Temperature Detection Ranges: -10-50, 2 Humidity Detection Ranges: 0-99%RH, 3%RH Input Voltage: 5V, 1A Battery: Built-in 3.7V, 1200mAh Lithium Battery Current: 80mA Power: 0.3W Item Size: 88 * 70 * 35mm/ 3.5 * 2.8 * 1.4in Item Weight: 150g/ 5.3oz Package Size: 140 * 98 * 48mm/ 5.5 * 3.9 * 1.9in Package Weight: 210g/ 7.4oz Packing List: 1 * Air Quality Monitor 1 * USB Cable 1 * Manual