For the flow of oxygen rotate clockwise. Continuing the rotation increases the flow, fig. 1.
INSTRUCTION FOR USE:
Insert the tube on the top of the tube connector on the source spout, fig. 2.
Delicately insert in each of the nostril one tube of the nasal adaptor. Wrap both right and left tubes around the back of the ears, pulling them down along the jawline to pass under the chin. Tighten using the plastic positioning ring, fig. 3.
Administer oxygen with head tilted backwards, fig. 4.

For a rational use, open the valve while inhaling and close it while exhaling