In an ordinary concert, the sound level is generally 105-115DB, people's hearing, if in such a high decibel situation, more than 1.5 minutes, will cause damage to the hearing.The function of this silicone earplug is to effectively filter noise, retain the clarity of quality, and reduce the damage to hearing caused by noise Tips: The the earplug into the ear canal, the better the sound insulation effect, and the lower the comfort, please adjust the depth of the earplug according to your requirements, generally inserted between the second layer and the third layer of silicone can meet your anti-noise requirements and no swelling pain in the ear canal is appropriate.Even if worn correctly, in most environments, the product can only reduce the noise volume value but not completely block noise How to wear: Gently pull up the upper part of the ear, align the earplug with the ear canal, and gently rotate it to the appropriate position to that the air in the ear canal does not connect with the atmosphere User group: children above 6 years old Attention: This product can be used and cleaned repeatedly, but it is recommended to gently wipe the dust with warm water or wipes. Material: silica gel colour: black Package Contents: 1 pair x For standard size earplugs with filter 1 pair x For small size extra earplug shell 1 x aluminum shell Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.