Usage:
1. Hold the unit in an upright position.
2. Exhale Normally and then place your lips tightly around the mouthpiece at the end of the green tubing.
3. LOW FLOW RATE - Inhale at a rate to raise only the ball in the first chamber. The second chamber ball must remain in place. This position should be held for three seconds or as long as possible whichever comes first.
4. HIGH FLOW RATE- Inhale at a rate to raise the first and second chamber balls. Ensure that the third chamber ball remains in the rest position for the duration of this exercise.
5. EXHALE- Take out the mouthpiece and exhale normally.
RELAX (Repeat) - Following each prolonged deep breath, take a moment to rest and breathe normally. This exercise can be repeated according to physician's instructions.

Precautions:
1. Before use, please check that all components are clean and free of other impurities.
2. Connect the mouthpiece and tube to the interface of the spirometry device, and make sure that there is no air leakage.
3. For single patient use, rinse the mouthpiece with warm water and drain after use.
4. This product is a disposable design, improper disinfection or disassembly will cause the inaccuracy of the product or damage.
5. Please follow the doctor's instructions for use.