Portable Air Quality Meter HCHO/TVOC/CO2/PM2.5/PM10/AQI/C6H6 Temperature and Humidity Tester 4.8Inch Large Screen Carbon Dioxide Detector with Time Display and Alarm Clock Function This detector has 4.8inch large screen display, which can be used to test and display the concentration of HCHO, TVOC, CO2, PM2.5, PM10, AQI, C6H6, temperature and humidity at the same time. Suitable for agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, and etc. Features: 【9in1 Air Quality Tester】: This detector can be used to test and display the concentration of HCHO, TVOC, CO2, PM2.5, PM10, AQI, C6H6, temperature and humidity at the same time. 【High Accurate Sensors】: Uses high-precise semiconductor TVOC sensor, electrochemical CO sensor, infrared PM2.5 sensor, temperature and humidity sensor, with high sensitivity, superior interference resistance ability, stable working performance, with low power consumption.  【Large Screen Display】: This air quality monitor with a 4.8inch large screen display, you can the data is clearly visible and the screen is not dazzling. 【Cellphone APP Control】: Search for APP in the application program, the device will enter the pairing state after the firsttime opening, and you can view the specific data on the APP after completing the connection. (Because it takes time to upload data, it is normal for the APP data to deviate from the real-time data of the detector.) 【AQI Air Quality Level Indication Function】: Equipped with air quality level division function, use different color to show the different quality of the air being monitored, allowing you to more accurately and more visual know the current air conditions. 【Strong Heat Dissipation】: Hundreds of ventilation holes reserved on the housing not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a fine heat dissipation effect. 【Wide Applications】: Real-time detection, automatic refresh data, with multi-use. Suitable for agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, business offices, and etc. Specifications: Model: PTH-9BW Color: White Battery: Built in 5V 2400mAh lithium battery Air Quality Level(AQI):0-500 Carbon Dioxide: 400-5000 ppm [±(50ppm +5%)] Temperature: -10°C~40°C(±2°C) / 14°F~104°F(±3.6°F) Humidity: 20~80%RH(±5% RH) HCHO: 0~2mg/m³(±15%) TVOC: 0~5mg/m³(±15%) C6H6: 0~3mg/m³(±10%) PM10: 0~1000ug/m³(±10%) PM2.5:0~1000ug/m³(±10%) Wireless Connection: Wi-Fi(only for 2.4GHZ network) Input: 5V/1A Material: ABS Item Size: 9.8 * 9 * 4 cm / 3.86 * 3.54 * 1.57 inch Item Weight: 233g / 8.22oz Package Size: 14 * 10 * 4.8 cm / 5.51 * 3.94 * 1.89 inch Package Weight: 346g / 12.2oz Package List: 1 * Air Quality Meter 1 * Type-C Cable 1 * User Manual (English)