Model: H7124 (With PM2.5 Sensor); H712C (Without PM2.5 Sensor) With its advanced H13 Level HEPA filter achieving an impressive 99.97% filtration efficiency, the purifier eliminates tiny particles from the air, ensures an immaculate and fresh area up to 1046ft² with the powerful 135cfm, and peaceful nights with a quiet 24 dB operating noise level in sleep mode. Its Auto Mode and PM2.5 sensor intelligently adjusts the purification levels to match the current air quality, ensuring optimal efficiency at all times. Immediate Purification: Switch to Turbo mode setting rapidly eliminates airborne pollutants, ensuring a healthier environment in a fraction of the time. Auto Mode & PM2.5 Sensor: Purification levels can be auto-adjusted based on the surrounding air quality detected by the sensor, for easy and optimal air purification at all times. (H712C requires pairing with H5106 to enable Auto Mode.) Powerful Filtration System: The H13 Level HEPA filter boasts an impressive 99.97% filtration efficiency for air particles 0.1-0.3 μm, making it highly effective at removing even tiny contaminants from the air. Strong Purification Capacity: This air purifier can purify up to 1046ft² area with up to 135cfm CADR, ensuring clean and fresh air for your entire space. Quiet Purifying: This purifier operates quietly at a low noise level of 24 dB in sleep mode, ensuring a peaceful environment while efficiently removing pollutants and allergens from the air. Control from Anywhere: Take advantage of true smart capabilities using Govee Home App to control this purifier from anywhere, for convenient and easy air purification at any time. Integrated Ambient Lighting: Create a smooth and relaxing atmosphere in the home or office with the integrated LED RGB ambient lighting, controllable via the app. *Only the H7124 model has PM2.5 Sensor and supports Auto Mode.*H712C requires pairing with H5106 to enable Auto Mode.*The recommended optimal usage area for best performance is 209 square feet.