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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Description

🔊 Hear everything, miss nothing — the ultimate in-ear hearing shield for pros and weekend warriors alike.

ALL DAY COMFORT - Ultra-light, in-ear design that disappears under any headgear for seamless wear during long sessions.
EFFORTLESS CONTROL - One-button touchpad with 2-mode operation—simple, intuitive, and distraction-free.
BIONIC HEARING MODE - Amplifies soft sounds up to 5X for natural, crystal-clear awareness without missing a beat.
ELITE NOISE DEFENSE - Up to 40 dB impulse noise protection keeps your hearing pristine in the loudest environments.
PRO GRADE RELIABILITY - Military-grade durability and battery life that stays strong through hundreds of shots—no mid-day recharge panic.

The OTTO Engineering NoizeBarrier Micro V4-11029 is a cutting-edge in-ear hearing protector designed for shooters and outdoor enthusiasts. It delivers up to 40 dB impulse noise reduction, adaptive noise attenuation, and a hearing enhancement mode that amplifies ambient sounds up to 5 times. Featuring high-definition Accu-Technology sound quality, a simple one-button interface, and a lightweight, comfortable fit, it ensures natural hearing and reliable protection all day long. Trusted by professionals for its durability and performance, it’s the smart investment for preserving your hearing without sacrificing situational awareness.

Specifications

ASIN	B07SSDDND1
Best Sellers Rank	#123,656 in Health & Household ( See Top 100 in Health & Household ) #453 in Earplugs
Brand	OTTO Engineering
Brand Name	OTTO Engineering
Color	Blk
Customer Reviews	4.5 out of 5 stars 246 Reviews
Global Trade Identification Number	00737488048100
Item Dimensions	5.3 x 5.2 x 2.5 inches
Item Form	Pair
Item Weight	0.75 Pounds
Manufacturer	OTTO Engineering
Manufacturer Part Number	V4-11029
Material	Plastic, Silicone
Material Type	Plastic, Silicone
Model Name	V4-11029
Model Number	V4-11029
Noise Attenuation	15 dB
Noise Reduction Rating (NRR)	28 Decibels
Number of Items	1
Number of Pieces	2
Package Size Name	Pack of 2
Product Style	Uncorded
Recommended Uses For Product	Noise Protection
Reusability	Partially Reusable
Single Number Rating (SNR)	15 Decibels
Size	1 Count (Pack of 1)
Style	Uncorded
UPC	737488048100
Unit Count	1 Count
Warranty Description	1-year warranty

Reviews

T**M

15.11.2025

P**N

1.03.2025

H**Y

13.02.2024

R**G

1.08.2024

B**Y

27.12.2021

C**R

2.11.2025

F**0

22.01.2026

D**R

11.07.2020

D**E

22.03.2026

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