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 Huma-i black (HI-150), advanced portable air quality monitor Indoor Outdoor which measures CO2, VOCs, particles (PM2.5 & PM10), temperature, humidity. PM (Particulate Matter) Display Mode: Displays PM2.5 and PM10 readings at the same time. VOC (Volatile Organic Compound) Display Mode: VOC concentration is displayed along with the ppm unit figures. CO2 display mode: CO2 concentration is displayed in graph form. * The CO2 sensor applied to our product is CO2eq (CO2 equivalent), which is calculated based on the H2 concentration that occurs when breathing in the fasting state. It can react with other harmful gases in the environment. If it is in a poor/unhealthy condition, use it as a ventilation guide for indoor air management. Temperature/Humidity Mode: It shows temperature and humidity in one screen. * In temperature and humidity, the temperature/humidity sensor is inside the product and may cause a deviation of 5~10%. Specifications: * Product: Portable air quality monitor * : Huma-i Black (HI-150) * 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.