The earplug is inserted into the ear canal after being thinned, which can reduce part of the noise, but is not completely soundproof.
Precautions:
1. Make sure that the earplugs are rubbed thin before being inserted into the ears, otherwise good results will not be achieved;
2. Remember to pull the ears upwards and outwards before inserting them into the ears, and the earplugs will not be effective until they are inflated;
3. Please keep your hands clean during operation;
4. Pull out slightly, slowly, and rotate when taking it out;
5. Replace the earplugs in time.
