Instructions for use: 1. Open the charging box and take out the main unit; 2. Press the start/stop switch, and a red light beam will be emitted at this time; 3. Press the protrusions on both sides to adjust the opening distance of the nasal congestion tube; 4. Align the two nasal congestion tubes Nostril; 5. Make sure that the two light sources enter the nasal cavity 1 to 1.5 cm; 6. The light source will automatically turn off after 5 minutes of use (the LED light of the nasal congestion head
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