If you want hearing protection for a child at the gym or a loud event, choose PROTEAR Kids Hearing Protection; if you need a way to send gym-equipment audio to wireless headphones, choose Herfair 5.4. These products solve different problems: PROTEAR is an adjustable pair of earmuffs with a stated 25dB NRR, while Herfair is a Bluetooth audio adapter with transmitter, receiver, and TF card modes. My choice for protecting a child from noise is PROTEAR; for listening to compatible gym equipment, it’s Herfair.
• PROTEAR’s biggest strength: 25dB NRR hearing protection in adjustable, foldable earmuffs. Main trade-off: it’s for reducing exposure to noise, not for streaming music or connecting to devices.
• Herfair 5.4’s biggest strength: three audio modes, Bluetooth 5.4, and more than 18 hours of stated battery life. Main trade-off: it connects audio devices; it does not provide hearing protection.
• Choose PROTEAR for a child who needs earmuffs for loud events, travel, school, or other noisy settings.
• Choose Herfair if you already have wireless headphones and want to connect them to gym equipment or other devices with a 3.5mm audio jack.
PROTEAR is the more relevant choice when the goal is to reduce a child’s exposure to loud sound. Its stated noise reduction rating is 25dB NRR. The earmuffs have a padded headband, soft ear cushions, adjustable sizing, and ear cups that swivel 360 degrees. Those details point to a design intended to fit different head shapes and sit around a child’s ears, rather than a small accessory that connects to electronics.
The listed age range is 3–16 years, and the product details describe an adjustable over-the-head fit. That makes it worth considering for families who need one pair for a child to use at events, on airplane trips, at school, or at home. The earmuffs fold back into the headband for more compact storage, which may be useful when packing them in a backpack. The manufacturer also lists ABS and PU materials and a one-year warranty.
The trade-off is straightforward: these are passive earmuffs, not Bluetooth headphones. They won’t connect a child to music or in-flight audio, and their stated noise reduction does not mean every sound will disappear. Skip PROTEAR if you’re looking for wireless audio, music playback, or a way to connect headphones to gym equipment.
Herfair 5.4 is an audio adapter for someone who already owns wireless earbuds or headphones and wants to use them with a device that has a 3.5mm audio connection. In transmitter mode, it can send audio from compatible sources—such as gym equipment or airplane entertainment—to wireless headphones. Its receiver mode is designed for the reverse kind of connection, and the third mode lets it play supported files from a TF card. The listed formats include MP3, WAV, FLAC, and APE, with MP3 recommended.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-19 · 7 min read · Independent comparison
The trade-off is that Herfair is an accessory, not a set of headphones. You’ll need compatible wireless headphones for listening, and it does not reduce noise or protect your hearing. Skip Herfair if you need earmuffs for a child, or if your priority is hearing protection rather than connecting audio devices.
• Best for reducing a child’s exposure to loud sound → PROTEAR Kids Hearing Protection. Its stated 25dB NRR is the key distinction; Herfair is an audio adapter, not protective earmuffs.
• Best for sending gym-machine audio to wireless headphones → Herfair 5.4. Its transmitter mode is intended to connect audio from gym equipment with a 3.5mm jack to wireless headphones.
• Best for a child’s noisy event or travel use → PROTEAR. It is listed for children ages 3–16 and folds for easier packing.
• Best for long listening sessions without a recharge → Herfair. Its stated battery life is over 18 hours, and it can operate while charging by USB-C.
• Best for built-in playback without a separate audio source → Herfair. Its TF card mode supports several audio formats, including MP3, WAV, FLAC, and APE.
• Best for a simple, non-electronic fit → PROTEAR. The adjustable headband, swivel ear cups, and soft cushions support a straightforward earmuff design.
• Best for someone who already owns earbuds or wireless headphones → Herfair. It provides a way to connect those headphones to compatible audio sources; it does not include the listening experience of headphones itself.
For the gym, the distinction matters more than any feature-by-feature tally. If the need is to listen to a machine’s audio through wireless earbuds, Herfair is the relevant product. If the need is to cover a child’s ears in a loud gym or at an event, PROTEAR is the relevant product. Neither one is a substitute for the other.
Start with the job you need the product to do. PROTEAR is designed to reduce noise reaching a child’s ears. Herfair is designed to move audio between compatible devices and wireless headphones. Calling both “headphones” can make them seem comparable, but they are not interchangeable: one is a set of protective earmuffs, and the other is an adapter.
For PROTEAR, check whether an adjustable over-the-head earmuff design fits the child’s intended use. The listed age range is broad, and the ear cups swivel, but fit still matters for comfort and coverage. Its foldable structure may help with storage, while the padded headband and soft cushions are the comfort features described. The stated NRR is useful information, but it should not be read as a promise that all sound is blocked.
For Herfair, confirm that the device you want to connect has a 3.5mm audio jack and that your headphones are wireless and compatible for pairing. Think about which mode you need: transmitting audio, receiving it, or playing files from a TF card. The over-18-hour battery claim and ability to use the adapter while charging may suit longer sessions, but the product still depends on your headphones for listening.
If your search is for the best comfortable bone conduction headphones for gym, neither item is a bone-conduction headset. PROTEAR is an earmuff, and Herfair is an adapter that pairs with headphones you supply. Likewise, someone searching for a hi res wireless headset for gym should note that Herfair describes supported file formats for TF card playback, but it is not itself a headset. And if you want the best on ear headphones for gym, PROTEAR’s around-ear protective earmuff design and Herfair’s adapter are different categories from on-ear listening headphones.
My Verdict
For a child who needs hearing protection, I would choose PROTEAR because it has a stated 25dB NRR and an adjustable, foldable earmuff design.
For adult gym listening, I would choose Herfair if the equipment has a 3.5mm audio jack and I already own wireless headphones.
My overall pick for protecting a child at the gym is PROTEAR, because the protective function is the more important need in that scenario.
No. It is a Bluetooth adapter with transmitter, receiver, and TF card playback modes. You need compatible wireless headphones or earbuds to listen to audio sent through it.
The listed features describe adjustable earmuffs with a 25dB NRR, not a Bluetooth connection or audio playback. If you need to route audio from gym equipment to wireless headphones, Herfair is the more relevant product.
That depends on whether you need hearing protection or audio connectivity. PROTEAR is the option for a child who needs earmuffs in a noisy setting; Herfair is for connecting compatible gym equipment to wireless headphones.
No. The adapter’s TF card mode supports MP3, WAV, FLAC, and APE files, with MP3 recommended. Herfair is still an adapter, not a headset, and the specifications do not identify it as a hi-res wireless headset.
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