Where are these manufactured?

I’m pretty sure these are made in the plant down the street from me. Check their website. Otto Engineering of Carpentersville Illinois.

Can volume be adjusted for each ear

Yes, but there are only TWO settings... and it’s not as good on sound canceling / reduction when firing weapons as a standard peltor or similar ear pro device.

Is it possible to replace the rechargable batteries as they age, or you have to buy another set? (and if not replaceable, approx. how many charges?)

Not replaceable. You would have to buy another set

Anyone use these for loud music, or concerts?

I’ve use these for figure eight derbies and they were great but they’re not a license Dealer and they will not honor the one-year warranty

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🔇 Silence the chaos, amplify your focus.

AMPLIFY THE QUIET - Hearing enhancement mode boosts soft sounds up to 5X, so you never miss a critical detail.
CRYSTAL CLEAR AUDIO - Accu-Technology delivers high-definition sound quality with balanced armature receivers for natural, safe hearing.
EFFORTLESS OPERATION - One-button touchpad with dual modes ensures seamless switching and intuitive control on the go.
ADAPTIVE SOUND CONTROL - Smartly attenuates ambient noise by up to 15 dB, keeping you focused without losing situational awareness.
ULTIMATE NOISE DEFENSE - Blocks up to 40 dB of impulse noise for unmatched hearing protection in high-impact environments.

The OTTO Engineering NoizeBarrier Micro V4-11029 offers premium hearing protection with up to 40 dB impulse noise reduction and adaptive attenuation of 15 dB. Featuring advanced Accu-Technology for high-definition sound and a hearing enhancement mode that amplifies soft sounds by 5X, it ensures natural, safe hearing. Its balanced armature transducers cover a wide frequency range (40Hz-16kHz) and are controlled via a simple one-button touchpad with two operational modes, making it ideal for professionals demanding both protection and clarity.

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