(as of Aug 14,2021 16:37:22 UTC – Details)
Pairing method: 1 and 2 filters. The filter should be replaced once a week, but it should be replaced according to the actual situation.
Perfect size: 7.9 * 5.9 (inches), suitable for adults of all ages. Adjustable, very suitable for heads of various shapes and sizes.
Suitable for indoor and outdoor activities, such as house cleaning, gardening, skiing, subway, etc., suitable for cycling, camping, running, traveling, climbing and daily use.
If you have any questions, you can contact us and we will reply within 24 hours.