Model Number: CUM-01-3 Key Specifications/Special Features: Fittingandcareinstructions:Gentlypullearoutwardandupwardandinsert the plugintoearcanalwithaslighttwistingmotion, neveruseforce,allow the plugtositcomfortablyinear.Ifpainful,removeandreinsert, checkthatplugsfilterbackgroundnoiseandretainspeechquality, Ifspeechcannotbeheard, plugsmaybe a wrongsizeorinsertedincorrectlyWashwithwarmsoapywateror70%alcohol, keepincaseprovidedwhennotinuse, incaseofearinfectionorproblems, consult doctorbeforeusePrinciple of reduce pressure:Earbuds into the ear, principle is to make the air does not directly into the ear, air through the earplugs holes into the air chamber, will adjust the pressure through air chamber, when pressure changed, both ends form resistance, air is not directly into the ear, adjust the air pressure change through the air chamber, making the function of the ear's Eustachian tube will not result in a rapidly changing air pressure and cause too much pressureApplications of pressure reduction earplug:
1. Airport dock
2. High-speed skiing
3. High-speed elevator
4. High-speed subway
5. Bustling downtown

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