1. We suggest changing the air filter once a month.
2. SpO2 Buy Separately
3. The buyer from Brazil Please Selects "With N4-SML". Because it ships from Local Stocks (San Paolo).
NM2 Nasal Mask
F1B Full Face Mask
WNP Nasal Pillows Mask (Include Three Size Cushions S/M/L)
N4 (Include Three Size Cushions S/M/L)
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