3-STAGE FILTRATION: It includes a pre-filter to trap hair and large particles, a true HEPA filter to remove fine airborne particles, an activated carbon filter to remove odors and VOCs from the air. | HIGH PERFORMANCE: HEPA filters remove 99.97% airborne particles as small as 0.3-microns, such as dust, smoke and VOCs. | REPLACEMENT ALERT: When the PM2.5 light turns RED and keeps flashing, this is a reminder to check and change the filter. To reset the replacement alert, press the FAN and TIMER buttons simultaneously and hold for 3 seconds. | FRIENDLY REMINDER: Please power off before replacing the filter. Remember to close the front shell properly after replacement. Otherwise, it will fail to process power out of safety concerns. | EASY REPLACEMENT: Unwrap the package from the filter and place it in your air purifier. No additional tools required for fresh, clean air.

&q;:&q;Airthereal: For An Ethereal Ambiance In order to protect your health, Airthereal was established in 2017 in order to improve indoor air quality around the world. Since then, we have been fighting against a multitude of health hazards that are present in the air we breath. Our mission at Airthereal is to keep your family healthy and happy. Airthereal stays at the forefront of air purification innovation in order to constantly improve our products and your experience. When to Replace 1. Replacing the air filter every 6-8 months for optimal use (or according to your air filter status). 2. It is time to replace the air filter when the following signals appear: increased noise, decreased airflow, clogged filters, presence of odors from the unit. How to Replace 1. Unplug the air purifier and remove the front shell. 2. Remove the old filter and then unwrap the new air filter. 3. Install the new filter and make sure the pull-tab on the filter is facing outward and put the front shell back. 4. Press and hold the FAN and TIMER button simultaneously for 3 seconds to reset the unit. Then the replacement reminder will be off. Package List 2x APH260 True HEPA Air Filter (10.7 X 1.6 X 16.5 inches)PROP 65 WARNING: This product can expose you to some kind of chemical, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.&q;,&q;