Usage method:

1. Stretch the headband over the top of the head and cover the ears with the cup.

2. Loosen the headband in place and adjust the height of the cup until the hoop can support the cup and the ears feel comfortable.

3. The pad of earmuff should fit the head tightly.

4. Adjust the head hoop to ensure correct tightening.

Maintenance and cleaning:

1. The earmuff can only clean the surface. It is recommended to use neutral soapy water and warm water instead of soaking in water.

2. Do not use solvents, such as alcohol, acetone, etc.

3. Regularly check whether the earmuff is cracked or damaged, especially the sealing gasket, and replace it if necessary to ensure good sound insulation effect.