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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OTTO Engineering NoizeBarrier Micro Earplug, Black, V4-11029

OTTO Engineering NoizeBarrier Micro Earplug, Black, V4-11029

Product ID: 470624090

Details

Brand
OTTO
Colour
Black
Material
Thermoplastic
Recommended uses for product
Noise
Size
1 Count (Pack

🎧Balanced armature transducers for HD sound

🔊Up to 40 dB impulse noise protection

🔋Long-lasting battery with 90% charge after heavy use

Description

🎯 Hear every detail, miss nothing—your ultimate shooting sidekick.

BIONIC HEARING MODE - Amplify soft sounds up to 5X with natural clarity—stay alert and connected.
ELITE NOISE DEFENSE - Block up to 40 dB of impulse noise—protect your hearing without compromise.
DUAL MODE SIMPLICITY - One-button control with two intuitive modes—effortless switching for any environment.
PRO GRADE RELIABILITY - Trusted by military and law enforcement—built to perform in the toughest conditions.
SLEEK DISCREET COMFORT - Ultra-compact in-ear design fits under any headgear—wear all day, forget they're there.

The OTTO Engineering NoizeBarrier Micro Earplug delivers professional-grade hearing protection with up to 40 dB impulse noise reduction and adaptive noise attenuation. Featuring balanced armature transducers for high-definition sound and a hearing enhancement mode that amplifies soft sounds up to 5X, these sleek in-ear plugs offer natural hearing and unmatched comfort. Designed for shooters and outdoor enthusiasts, they combine durable build quality, long battery life, and simple one-button operation to keep you safe and aware in any environment.

Specifications

ASIN	B07SSDDND1
ASIN	B07SSDDND1
Batteries	2 Lithium Ion batteries required. (included)
Best Sellers Rank	#207,615 in Health ( See Top 100 in Health ) #1,285 in Earplugs
Brand Name	OTTO Engineering
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (215)
Customer reviews	4.4 4.4 out of 5 stars (215)
Department	unisex-adult
Global Trade Identification Number	00737488048100
Item Dimensions	13.5 x 13.2 x 6.4 centimeters
Item Form	Pair
Item Weight	0.75 Pounds
Item model number	V4-11029
Manufacturer	OTTO Engineering
Manufacturer	OTTO Engineering
Manufacturer Part Number	V4-11029
Material Type	Thermoplastic Elastomer or 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
Product Dimensions	13.46 x 13.21 x 6.35 cm; 340.19 g
Product Style	Uncorded
Recommended Uses For Product	Noise Protection
Reusability	Partially Reusable
Single Number Rating (SNR)	15 Decibels
Size	1 Count (Pack of 1)
Specific Uses For Product	Hearing Protection
UPC	737488048100
Unit Count	1.0 Count

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