User Manual

b. Take out the mask and install the headband according to the exploded view below:

3、Description of Mask Adjustment:：

a、Turn the headband first to make the headband adjusting knob at the back of the head, press

with hand and turn counterclockwise the headband diameter adjusting knob to broaden the

headband size; otherwise, narrow it.

b、Adjust the band depth location hole to adjust the lengthwise position of the headband from

head top to eyes;

tighten

loosen

tighten