1. First, align the plug-in of the helmet-type earmuff with the socket of the helmet, and insert it.
2. When using earmuffs, make sure that the earmuffs are in the correct working position. You can push the metal straps on both sides inward until there is a "click" sound on both sides, and then check whether the ear cups and the metal straps are pressed against the inner lining or edge of the helmet to avoid gaps and noise reduction.
3. If the inside of the earmuffs is wet due to the long-term use of the helmet-mounted earmuffs, do not put the earmuffs in the stop position.
