Omron C28P Instruction Manual page 11

10. Power on the compressor by pressing the power button; the blue
power indicator is lit. As the compressor starts, nebulization begins,
and aerosol is generated. Gently inhale the medication. Exhale
through the mouthpiece.
11. When treatment is completed, press the power button again to power
off the device. Then unplug the compressor from the power outlet.
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