- Electronic amplification mechanism that clarifies low pitch sounds but shuts down within milliseconds when sounds above 85dB, - Protect against the sounds of explosions, gunfire, heavy machinery, - Infinitely variable power soundproofing, - The ability to conduct a conversation - while keeping noise-function, - Convenient design with adjustable size, - Easy to transfer the deposit, - Powered by 4 AAA batteries (sold separately) - Weight: 235g - Color: black