4WDKING Rechargeable Electrical Air Purifying, Reusable Portable Air Purifier with HEPA Filter for Sleeping Outdoor…

Amazon.com Price: $39.99 (as of 02/01/2023 10:21 PST- Details)

Make sure this fits by entering your air purifier model number.
Supplied fresh air respirator system is equipped with portable power sources mainly overcome the problems of big air intaking resistance, difficulties in breathing, and so on.

Unique electronic ventilation design system, to keep the fresh air flowing through your nose and mouth, suitable for long time use.