Description :
3M H6A Professional Sound Insulation Noise-reducing Earmuffs
It is a good helper of noise interference when you at home， bedroom， travel， the factory， bustling downtown， watching F1 Games， etcYour new healthy life partner， To help you concentrate and protect your hearing :)
Specification :
Brand Name : 3MModel : H6AStyle : Head-mountedNoise level : NRR 21DB， SNR: 27DB
How to use :
1. Headstrap stretch to the max angle !#!amp!*!quot;opening!#!amp!*!quot; position and wear it overhead， and then make cover cup cover your ears2. Relax headstrap to return back and adjust the height of the cover cup until the headstrap can support the cover cups， and make your ears feel comfortable3. Soft mat of ear flaps should be tightly stick on your head4. Adjust the headstrap to ensure correct banding position， which can cut off the noise effectively
Package includes :
1 x 3M H6A Professional Sound Insulation Earmuffs
Details pictures :