- Breathe Easy: Ensure clean air in your home with the HARMNHLT indoor air quality monitor. This device accurately tracks PM2.5, PM10, CO2, HCHO, TVOC, temperature, and humidity. All readings are displayed on a high-definition color screen for quick and easy understanding. - Precise and Responsive: Equipped with advanced high-performance chips and infrared (NDIR) sensor technology, this monitor provides fast and accurate measurements. Readings refresh every 1-2 seconds, offering superior sensitivity and stability compared to typical sensors. - Extended Battery Life: Featuring a built-in 800mAh battery, the air quality detector operates for approximately 6 hours on a full charge. Charge it via the included USB cable. For optimal accuracy, avoid using the device while charging or when the battery is low. - Versatile Use: Its compact and stylish design makes it suitable for various environments including bedrooms, living rooms, kitchens, offices, cars, schools, hotels, basements, and restaurants. The device connects through a TYPE-C USB interface for easy charging. - Important Usage Tips: For best results, use the monitor indoors with doors and windows closed. Allow the device to operate for at least 60 minutes before taking readings to ensure accuracy. - Practical Applications: Ideal for monitoring air quality in your home, ensuring a healthy environment for your family. Perfect for office settings to improve workplace air quality, or for use in schools to maintain a safe learning atmosphere.