OTTO V4-11029 NoizeBarrier Micro Electronic Earplugs
The OTTO V4-11029 NoizeBarrier Micro Electronic Earplugs are rechargeable electronic hearing protection designed to provide advanced impulse noise reduction while maintaining exceptional situational awareness. Featuring dual operating modes, hearing enhancement, Accu-Technology™ high-definition sound, and a compact rechargeable design, the NoizeBarrier Micro is ideal for tactical, industrial, public safety, military, shooting sports, and professional users who require hearing protection without sacrificing communication or environmental awareness.
Operating Modes: Active hearing protection and hearing enhancement
Battery Runtime: Up to 16 hours continuous use
Charging Case: Up to 20 earplug charging cycles
Water Resistance: IP67-rated earplugs and charging case
Frequency Response: 40 Hz – 16 kHz
Transducers: Balanced armature receivers with wide-bandwidth, low-noise MEMS microphones
Key Features
Provides up to 40 dB impulse noise protection.
Offers up to 15 dB adaptive noise attenuation.
Dual-mode operation supports both hearing protection and hearing enhancement.
Amplifies soft sounds by up to 5× to improve situational awareness.
Maintains natural hearing for safe environmental sounds.
Accu-Technology™ high-definition audio for clear sound quality.
Simple one-button touch pad controls.
Rechargeable battery provides up to 16 hours of continuous operation.
IP67-rated earplugs and charging case resist dust and water.
Charging case features an LCD charging status display.
Package Includes
OTTO NoizeBarrier Micro rechargeable electronic earplug kit
Standard 3-flange ear tips (1 pair)
Large 3-flange ear tips (1 pair)
Universal foam ear tips (1 pair)
Lanyard
Filter replacement tool and replacement filters
Cleaning tool
USB charging cable
Rechargeable charging case
Specifications
Impulse Noise Protection: Up to 40 dB
Adaptive Noise Attenuation: Up to 15 dB
Hearing Enhancement: Amplifies soft sounds up to 5×
NRR: 28 dB (Foam Tips); 23 dB (3-Flange Tips)
SNR: 35 dB (Foam Tips); 31 dB (3-Flange Tips)
Frequency Response: 40 Hz – 16 kHz
Battery Performance: Up to 16 hours
Charging Case Capacity: Up to 20 recharge cycles
Environmental Rating: IP67
Compatibility and Applications
The OTTO NoizeBarrier Micro electronic earplugs are designed for professionals and enthusiasts who require reliable hearing protection while maintaining awareness of their surroundings.
Law enforcement
Military and tactical operations
Fire and emergency response
Shooting ranges and firearms training
Industrial and manufacturing facilities
Construction and heavy equipment operators
Aviation ground crews
Outdoor recreation and hunting
Benefits and Why Buy
Protect your hearing: Automatically reduces hazardous impulse noise while preserving safe sounds.
Enhanced situational awareness: Hearing enhancement mode amplifies quiet environmental sounds for improved detection and localization.
Rechargeable convenience: Up to 16 hours of operation with a portable charging case providing up to 20 recharge cycles.
Comfortable all-day wear: Multiple ear tip options help achieve a secure fit.
Built for demanding environments: IP67-rated construction helps withstand dust and water exposure.
Professional OTTO Engineering quality: Trusted hearing protection for mission-critical applications.
Important Notes
Select the ear tip size that provides the best seal and hearing protection.
Recharge the earplugs using the included charging case and USB cable.
IP67 protection applies when the earplugs and charging case are properly closed and maintained.
Follow all manufacturer instructions for cleaning, filter replacement, and maintenance.
Warranty
The supplied product information references both a 2-year warranty (included in the box contents) and a 1-year warranty (listed under features). The applicable warranty term should be verified before purchase.
Frequently Asked Questions
How long does the battery last?
The NoizeBarrier Micro provides up to 16 hours of continuous operation on a full charge.
How many times can the charging case recharge the earplugs?
The included charging case provides up to 20 complete earplug charging cycles.
What hearing protection rating do the earplugs provide?
The earplugs provide an NRR of 28 dB using the foam ear tips and 23 dB using the 3-flange ear tips. The SNR is 35 dB with foam tips and 31 dB with 3-flange tips.
Are the earplugs waterproof?
Both the earplugs and charging case are rated IP67 for dust and water resistance.
Can the earplugs amplify quiet sounds?
Yes. Hearing enhancement mode amplifies soft environmental sounds by up to five times while helping protect against loud impulse noise.
Need Help Choosing the Right Hearing Protection?
Contact HiTech Wireless for assistance selecting OTTO hearing protection products, communication accessories, quantity pricing, and technical support for your team or organization.
