Electronic Hearing Ear Protection Earmuff Protector Specail For Blasting

These specially deisgned over-ear hearing protectors not only protect your hearing from loud sources such as gunfire, but also allow you to hear normal conversation, range commands, even the sound of game in the woods. It features an electronic amplification mechanism that clarifies low pitch sounds, but shuts down within milliseconds when sounds above 85dB occur. Features:  Foldable, SNR 31DB  Instruction for use: When worn properly and given adequate care, this sound muffler provides excellent protection by filtering out high frequency noise caused by machinery, motors, saws and gunfire. 1.Extend headband to maximum open position and place the cups over the ears with the headband passing over the head. 2.Settle the head band in position on the head while adjusting the height of the ear cups up or down until they feel comfortable and the headband rests on the top of the head to support the muffs. 3.Make sure that the headband is evenly adjusted, left to right. The ear cushion should b