!!! WARM TIPS!!! 1. H13 True HEPA Filter: Before running homintell air purifier, please take out the plastic bag of H13 HEPA cartridge, put the H13 HEPA cartridge back into the machine and cover it before use. 2. Adapter: The adapter is inside the air purifier machine, please turn the air purifier upside down, open the lid and take out the adapter. Note: Use only the original adapter of Homintell air purifier! Please do not use the same type of adapter for plugging in, so as not to cause short circuit damage to the machine. 3. Replacement filter should be replaced every 3-6 months depending on the air quality in your area. Room air purifiers are built-in filter replacement indicator, the light ring will keep flashing in red to alert you to change the filter after 2000 hours working time. Please press the power button for 5S to reset after installing a new filter. Other 4. We have great confidence in our products, so we provide 1-year after-sales support, 2-year extended support for the product (extendable up to 2 years, see user manual for details). If there is any question, please do not jump to conclusions; instead, leave a message to tell us, we promise we will get back to you within 24 hours(working days), you' ll have our full attention and believe in our ability to satisfy you. What Homintell Air Purifiers can do for you ? 1. Innovative Operating Mode: 4 working modes for you to choose. 3 fans mode: simply roll the control ball angle to adjust the wind speed to high, medium, or low (note: the auto mode is no longer available); 22 dB ultra quiet sleep mode, you almost ignore the air purifier at night. 2. Faster and More Efficient Purification: The True H13 HEPA air purifier cleans up to 880 ft², and refreshes air once in 220 ft² room per 15 minutes. Air purifiers are designed people who have pets, children, or are sensitive. 3. Energy Saving & Versatile Application: daily power consumption is about 0.55 kilowatt hour. Suitable for home large room, bedroom, office, and so on, keep away from unhealthy air. Read more Navigator Air Purifiers Navigator Air Purifiers Air Purifier Replacement Filter Model Navigator Navigator Navigator Filter Application Bedroom/ Office/Living Room Bedroom/ Office/Living Room Navigator PM2.5 Detection ✓ ✓ / Filtering System H13 HEPA Filter H13 HEPA Filter H13 HEPA Filter Filter Reminder ✓ ✓ / Filter Lifespan 3-6 months 3-6 months 3-6 months Sleep Mode ✓ ✓ / Ship to California ✓ ✓ ✓