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ISOtunes Sport 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.

Key Features
Tactical Sound Control™
TSC™ is a level-dependent technology that uses omni-directional microphones to block harmful gunshot noise whilst allowing safe sounds to actively pass through the product. Lightning fast digital circuitry suppresses sound in under 2 milliseconds!
Hard-to-notice environmental sounds can be amplified up to 8x, meaning your ear protection keeps you aware of your surroundings whilst protecting your eardrums.
Bluetooth Enabled
Who says DEFY is just for a shoot? Equipped with Bluetooth connectivity, you also can enjoy music and take calls. Simply connect to 2 devices with automatic pairing.
Simple Controls
Simple buttons eliminate hassle at the range. Separate controls for Bluetooth and Tactical Sound Control™ allow you to tailor your listening experience.
Designed for Comfort
Built to avoid disrupting your cheek weld and be comfortable with shooting glasses. DEFY’s lightweight build keeps pressure off of the top of your head and aims to remove the notion that ear muffs are practical, not comfortable.
At just 440g, this earmuff is nearly a 450g lighter than other leading tactical earmuffs. Enjoy all-day wear with a vented headband and memory foam ear cushions.
Battery Backup Plan
DEFY includes a lithium-ion battery that supports 11 hours of connection with your device. Simply replace the battery with 3 AAA for an additional 22 hours of power.
TSC™ is a level-dependent technology that uses omni-directional microphones to block harmful gunshot noise whilst allowing safe sounds to actively pass through the product. Lightning fast digital circuitry suppresses sound in under 2 milliseconds!
Hard-to-notice environmental sounds can be amplified up to 8x, meaning your ear protection keeps you aware of your surroundings whilst protecting your eardrums.
Who says DEFY is just for a shoot? Equipped with Bluetooth connectivity, you also can enjoy music and take calls. Simply connect to 2 devices with automatic pairing.
Simple buttons eliminate hassle at the range. Separate controls for Bluetooth and Tactical Sound Control™ allow you to tailor your listening experience.
Built to avoid disrupting your cheek weld and be comfortable with shooting glasses. DEFY’s lightweight build keeps pressure off of the top of your head and aims to remove the notion that ear muffs are practical, not comfortable.
At just 440g, this earmuff is nearly a 450g lighter than other leading tactical earmuffs. Enjoy all-day wear with a vented headband and memory foam ear cushions.
DEFY includes a lithium-ion battery that supports 11 hours of connection with your device. Simply replace the battery with 3 AAA for an additional 22 hours of power.
TECH SPECS
Designed for hunters and shooters who need increased performance and safety with bluetooth enabled hearing protection. Ideal for those who prefer lightweight and comfortable devices that allow them to listen to music or communicate while shooting.
SNR 30dB
Yes
82dB
Yes
11 Hours
5.0
IP Rating IPx4
Lithium Ion
38.5 Hours
4 Hours
440g
FAQ
What is Tactical Sound Control Technology™?
Tactical Sound Control Technology™ protects you from gunshot noise while allowing you to communicate with others and hear the world around you.
How does it work?
Tactical Sound Control Technology™ uses omni-directional microphones to pick up outside sounds and amplifies them through your hearing protector, similar to a hearing aid or enhancer. Control buttons allow you to choose your preferred amplification level. This means you can wear hearing protection and still hear the world and those around you at a comfortable listening level. When outside noises e.g. gunshots, breach 85 db, Tactical Sound Control Technology™ responds by reducing the harmful sound down to help protect your eardrum.
How fast does TCS™ react?
TSC Technology™ is quick-acting. There are only 2 milliseconds between you and high-level protection. Wearing DEFY, you can continue to interact with your environment and still protect you from noise that could damage your hearing. DEFY ensures your safety but enables you to hear warning signals, approaching vehicles, friends and colleagues.
Who should use TSC™ Technology?
TSC Technology™ is perfect for the person who needs to protect their ears from gunshot noise but would like to hear the world around them.
When should I use TSC™ Technology?
TSC Technology™ is great for a day at the range, competitive shooting or on a shoot. Gunshot noise will be dampened or restricted completely by TSC Technology™ while safe environmental sounds will be amplified.
In consistently loud environments, TSC Technology™ will block all sound until the outside noise falls below 85db. In these cases, we recommend turning TSC Technology™ completely off until you’re not longer in that environment.
What is the warranty & guarantee?
Warranty: All ISOtunes® products come with a 1-year warranty against defects in material and workmanship. The warranty does not cover damage by misuse, abuse or unauthorised modifications. We will provide a free exchange for customers who experience defective products within 12 months of purchase.
Guarantee: Your satisfaction is guaranteed with a 30-day money back promise. If you are not completely satisfied with your product, please contact us within 30 days of purchase and we will provide a full refund*.
*Only items that have been purchased directly from ISOtunes.co.uk can be returned to ISOtunes. ISOtunes products purchased through other retailers must be returned in accordance with their respective returns and refunds policy.




















