interior, business offices, and etc. High Accurate Sensors: Uses high-precise sensors, with high sensitivity, superior interference resistance ability, stable working performance, with low power consumption. Digital Color Display: This air quality monitor with a 3.8inch large digital color display, display brightness adjustment, you can the data is clearly visible and the screen is not dazzling. And with date and time display, and dual alarm clock function. 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: Material: ABS Color: white, black (optional) Battery: 1 * 2500mAh lithium battery (included) Display: digital color display Operating voltage: 5V Sensors: PM2.5 sensor/ semiconductor sensor/ electrochemical sensor Operating temperature: 0-70 Humidity: 0-99%RH PM2.5: 0-999 ug/m3 PM10: 0-999 ug/m3 Formaldehyde: 0-9.999 mg/m TVOC: 0-9.999 mg/m3 AQI: 0-500 Item size: 112 * 78 * 35mm / 4.41 * 3.07 * 1.38in Item weight: 200g / 7.05ounce Package size: 135 * 115 * 43mm / 5.31 * 4.53 * 1.69in Package weight: 320g / 11.29ounce Packing List: 1 * Air Quality Monitor