Ⅰ. Enhance your indoor air quality monitoring with a device designed to measure various pollutants. This device uses multiple sensors, including a DART formaldehyde sensor, a laser dust sensor, an NDIR infrared carbon dioxide sensor, and a temperature and humidity sensor, to measure CO2, PM2.5, PM10, TVOC, formaldehyde, and other pollutants in indoor air. Ⅱ. Key Features: Measurements with an accuracy of 1 ppm provide information about the pollutants in your environment, allowing you to make decisions to create a living environment. The device can detect carbon dioxide levels and measure pollutants such as PM2.5, PM1.0, pollen, TVOC, temperature, and humidity, giving a comprehensive understanding of indoor air quality. Equipped with multiple sensors, including a DART formaldehyde sensor, a laser dust sensor, and an NDIR infrared carbon dioxide sensor, ensuring measurements. With an integrated 128 MB memory card for data storage, allowing access to previous measurements at any time. The device operates at DC 5V/2A and produces a sound level of 85dB (3M). Connects to Tuya App via WiFi, allowing checking and control of various home appliances such as smart curtains, fans, air conditioners, humidifiers, heaters, and air purifiers. With a measurement range of 400-5000 ppm and an operating temperature of 0ºC to 50ºC, designed for indoor use and can be carried and stored in a portable storage bag. Ⅲ. Specifications: HCHO measurement range: 0.01-1.25 mg/m3; HCHO accuracy: 0.03 mg/m3 or ± 5%; HCHO resolution: 0.01mg/m3; CO2 measurement range: 400-5000 PPM; CO2 accuracy: ± 50 ppm or ± 5%; CO2 resolution: 1ppm; TVOC measurement range: 0.01-19.99mg/m3; TVOC resolution: 0.01mg/m3; PM2.5 measurement range: 1-500ug/m3; PM2.5 resolution: 1μG/m3; PM10 measurement range: 1-500ug/m3; PM10 resolution: 1μG/m3; Temperature measurement range: -10-60 * C; Temperature accuracy: ± 2C; Humidity measurement range: 5% -95%; Humidity accuracy: ± 5%; Input voltage: DC 5V/2A; Memory card: 128 MB; Sound level: 85dB (3M); Operating temperature: 0 ºC-50 ºC; Operating humidity: 0-95% (non-condensing); Measurement range: 400-5000ppm; Measurement accuracy: 1 ppm; Measurement objects: carbon dioxide, PM2.5, PM1.0, pollen, TVOC, temperature, humidity; Power adapter: EU plug, US plug, UK plug (optional); Product color: white; Product size: 9 * 4 * 11cm / 3.5 * 1.6 * 4.3in; Product weight: 185g / 6.5oz; Package includes: 1 x Air Quality Monitor, 1 x Vertical Stand, 1 x Suspension Stand, 1 x Charger Adapter, 1 x Charger Cable, 1 x Instructions, 1 x Portable Storage Bag, 1 x Memory Card