Is the air around you safe? The Huma-i shows you what the air quality is. Because the air can be measured directly anytime, anywhere, Huma-i helps you stay out of polluted air. Differentiated design: * OLED screen * High visibility * Sleek design Display mode PM (Particulate Matter): Simultaneously displays PM2.5 and PM10 readings. VOC (Volatile Organic Compound) Display Mode: VOC concentration is displayed along with the ppm unit figures. In the case of VOC, the value will be displayed after 15~60 seconds when powering on, then the value will be updated every second. Specifications: * Product: Portable air quality monitor * Huma-i Skyblue (HI-120) * PM measurement range: 0 ~ 500 μg / ㎥ (PM2.5 / PM10) * Resolution: 1 μg / ㎥ * VOC measurement range: 0.000 ~ 10,000 ppm * Resolution: 0.001 ppm * CO2 measurement range: 400 ~ 10,000 ppm * Resolution: 1 ppm * Power supply: Li-polymer battery * Charging mode: USB micro 5 Pin * Dimension: 91 x 41 x 37 mm (3.6 x 1.6 x 1.5 inch) * Weight: 0.13 pounds (60 g) * Certifications: FCC CE.