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ISOtunes | iso-sport-defy
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ISOtunes Sport DEFY Bluetooth Ear Muffs (NRR 25)

Sale price$229.95 AUD
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Why you'll love it:

  • Attenuation (NRR) of 25dB
  • 8x Hearing Enhancement
  • Enhances Hearing While Blocking Gunfire
  • Dual Power: Rechargeable or AAA
  • High Noise Reduction
  • Blocks Noise for Safer, Clearer Audio

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ISOtunes Sport DEFY Bluetooth Ear Muffs (NRR 25)

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Key Features

Bluetooth Enabled

Who says DEFY BT is just for the range? Equipped with Bluetooth connectivity, you also can enjoy music and take calls.

Easy Access Controls

Simple buttons eliminate hassle at the range. Separate controls for Bluetooth and Tactical Sound Control™ allow you to tailor your listening experience.

Lightweight & Comfortable

Weighing just 440 grams, this earmuff is nearly 230 grams lighter than other leading tactical models.

Description

Hearing protection without compromise.

DEFY is a tactical earmuff that defies every assumption shooters have about painful and restrictive hearing protection. This modern take on a traditional style earmuff features next-generation technology, providing environmental awareness and gunshot noise attenuation.

Features

Tactical Sound Control™ Technology enhances your hearing up to 8x while protecting you from high-impact noises in under 2 milliseconds.

Lightweight Design at just 15.5 ounces with a vented headband and memory foam ear cushions.

Rechargeable Battery provides up to 11 hrs of connection to any device.

AAA Battery Compatible for up to 22 hrs of connection (not included).

Automatic Power Off after 4 hours for battery conservation.

SafeMax™ Technology limits volume output to 85 dB for all-day, damage-free listening.

Bluetooth 4.2 connects, and dual-connects, devices up to 30 feet.

IPX4 Durability for sweat and water resistance.

25 NRR tested and approved to ANSI s3.19-1974.

Noise-Isolating Microphone for clear communication in loud environments.

Key certifications:

NRR 25

An NRR of 25 means that the hearing protection is estimated to reduce noise levels by an average of 25 decibels across various frequencies.

'NRR' in hearing protection stands for 'Noise Reduction Rating,' which is a single value used to indicate the average level of noise reduction a hearing protection device provides across different frequencies, essentially telling you how much sound attenuation the earplugs or earmuffs will offer when worn correctly; the higher the NRR value, the greater the noise reduction level is considered to be.

NRR is primarily used as a rating system in North America, while Europe often uses 'SNR' (Single Number Rating) and Australia/New Zealand use 'SLC80'; which both differ slightly in calculation.

SNR 23

An SNR of 23 means that the hearing protection is estimated to reduce noise levels by an average of 23 decibels across various frequencies.

'SNR' in hearing protection stands for 'Single Number Rating,' which is a single value used to indicate the average level of noise reduction a hearing protection device provides across different frequencies, essentially telling you how much sound attenuation the earplugs or earmuffs will offer when worn correctly; the higher the SNR value, the greater the noise reduction level is considered to be.

SNR is primarily used as a rating system in Europe, while North America often uses 'NRR' (Noise Reduction Rating) and Australia/New Zealand use 'SLC80'; which both differ slightly in calculation.

Tech Specs

Material
Plastic earcups
Metal headband
Memory foam ear cushions
Vented headband padding
Lithium-ion battery
Electrical components
Fit
Sport DEFY earmuffs have an adjustable headband and are designed to fit most (S-L)
Weight
440g
Child Safe
Not designed for children
Audio
Delivers clear and balanced audio for music, podcasts and phone calls.
Microphone
Yes, allows for communication during phone calls or team interactions.
Attachable boom-mic for enhanced clarity in loud environments available seperately.
Certified For
Australia & NZ (SLC80): False
USA (NRR): True
EUR (SNR): True
Charging Port
Micro-USB

Attenuation Details

Frequency (Hz) 125 250 500 1000 2000 4000 8000
Mean Attenuation (dB) 17.5 21.4 26.6 29.3 37.6 46.4 39.6
Standard Deviation (dB) 4.5 2.5 2.6 2.3 3.7 4.6 6.8
APV (dB) 13.0 18.9 24.0 27.0 33.9 41.8 32.8

In the Box

  • 1x Link Aware Earmuffs
  • 1x USB-C Charging Cable
  • 1x Removable Lithium-ion Battery *AAA Battery Compatible
  • 1x quick start guide

Product Care

  • Clean earmuffs with a damp cloth and mild soap if needed.
  • Do not submerge in water or use abrasive cleaning solvents.
  • Ear cushions and foam inserts should be replaced regularly to maintain effectiveness.
  • Store in a clean, dry place between -20°C and 50°C.
  • Avoid exposure to chemicals like bug spray and sunscreen.
  • Do not fully discharge the battery before long-term storage.
  • Inspect the earmuffs regularly for any damage or deterioration.

Instructions

Fitting

  • Remove the white foam inserts from each earcup.
  • Pull the earcups apart to extend the headband.
  • Place the headset on your head, ensuring the earcup labels match the correct side.
  • Adjust the headband to ensure a snug and comfortable fit.

Power On/Off

  • Power On: Press and hold the Multi-Function Button (MFB) for 3 seconds (you will hear “Power On”).
  • Power Off: Press and hold the MFB for 3 seconds (you will hear “Power Off”).

Bluetooth Pairing

  • Open Bluetooth settings on your device.
  • Search for "ISOtunes Sport DEFY."
  • Select the device from the list and connect.
  • You will hear “Bluetooth Connected” when the pairing is successful.

Dual Connection Mode

  • This feature allows the earmuffs to connect to two devices at the same time.
  • Pair and connect to the first device as usual.
  • Hold the MFB for 7 seconds until you hear "Bluetooth Pairing Mode."
  • Pair the second device as usual.
  • Go to the Bluetooth menu on the first device and manually reconnect.
  • Both devices are now connected.

Pairing Reset

  • Press and hold Volume Up (1) and Volume Down (2) for 4 seconds to reset pairing.

Music Controls

  • Play/Pause: Press MFB once.
  • Next Track: Press MFB twice.
  • Previous Track: Press MFB three times.
  • Music Volume Up: Press Volume Up (1).
  • Music Volume Down: Press Volume Down (2).

Phone Calls

  • Answer/End Call: Press MFB once.
  • Reject Call: Hold MFB for 1 second.

Siri / Google Assistant

  • Press and hold MFB for 1 second to activate voice assistant.

Compatible Parts

Frequently Asked Questions

Take a look at our most frequently asked questions for the ISOtunes Sport DEFY Bluetooth Ear Muffs (NRR 25). If you have any further questions, get in touch here.

Reviews

5.0
Rated 5.0 out of 5 stars
Based on 1 review
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
ProtectionRated 5.0 on a scale of 1 to 5
QualityRated 5.0 on a scale of 1 to 5
ComfortRated 5.0 on a scale of 1 to 5
1 review
  • SF
    Scott F.
    Flag of Australia
    Verified Buyer
    I recommend this product
    Age Range 45 - 54
    Gender Male
    Used For Shooting
    Rated 5 out of 5 stars
    3 years ago
    Great product

    What’s not to like about it

    Easy to use protection

    Great adjustable sound quality

    ProtectionRated 5.0 on a scale of 1 to 5
    QualityRated 5.0 on a scale of 1 to 5
    ComfortRated 5.0 on a scale of 1 to 5

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