KESIEME is my pick when earbuds mic sound muffled is the worry: its open-ear bone-conduction design keeps you aware while streaming outdoors.
ISCREM is the runner-up for streaming calls, with a rotatable single-ear fit and hands-free voice answering.
ISCREM is the runner-up for streaming calls, with a rotatable single-ear fit and hands-free voice answering.
earbuds mic sound muffled at a Glance
• KESIEME Swimming Headphones — best for outdoor streaming and workouts; pick this if you want an open-ear design, Bluetooth playback, and 32 GB of built-in memory.
• ISCREM Headset — best for hands-free calls while streaming; pick this if you prefer a single earpiece with voice answering and a rotatable fit.
• CMF BY NOTHING Buds 2 — best for everyday streaming with adjustable noise cancellation; pick this if you want six microphones, app-based sound settings, and in-ear playback.
• CMF BY NOTHING Buds 2 — best for the same feature set in a different listed color; pick this if the Light Orange option suits you better than Light Green.
KESIEME’s Swimming Headphones are open-ear bone-conduction headphones rather than conventional earbuds that seal inside the ear. The wraparound frame is designed to stay in place during movement, and bone conduction sends sound through vibrations at the cheekbones. That design leaves the ear open to surrounding sounds, which may suit someone who wants to listen while running or cycling without blocking out the environment.
For streaming, Bluetooth 5.4 provides a wireless connection to a compatible device. The built-in 32 GB memory offers another listening route: load audio onto the headphones and play it in MP3 mode. That distinction matters in the water, because the product information says Bluetooth cannot transmit underwater. The stated IPX8 protection and included swimming earplugs make swimming a specific use case, but underwater listening relies on stored audio, not a live Bluetooth stream.
The battery claims vary within the product details: one feature description says six to eight hours of continuous music, while another states more than ten hours at 60% volume. I would treat those figures as differing estimates rather than promise a specific session length. The listed Type-C recharge time is about two hours. Button controls give you a physical way to manage playback, which can be useful when a touchscreen device is tucked away during exercise.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-11 · 8 min read · Independent comparison
The ISCREM Headset is a single-ear wireless Bluetooth earpiece with a rotatable hook designed to fit either ear. Its focus is calls and hands-free use rather than immersive listening through two earbuds. The product description mentions voice commands for accepting or declining calls, alongside button controls for functions such as power, mute, and volume. For someone who wants to keep one ear more available while taking calls during a stream, that setup has a practical appeal.
The headset’s published battery information lists up to ten hours of talk time and up to 240 hours of standby. A two-hour charge time is also listed. Those details point toward a device intended to stay ready for extended work or travel stretches, though actual runtime can depend on use. Its Bluetooth range is listed as 15 meters, and the description says it works with Bluetooth-capable phones, tablets, and laptops.
The microphone is a stronger part of its stated purpose than it is for the swimming model: the product description identifies CVC 8.0 noise reduction for calls. That gives shoppers a relevant feature to consider when they are troubleshooting muffled voice transmission. Still, the provided information does not specify microphone pickup patterns or guarantee how a caller will sound in every room. I would see it as a call-oriented option, not proof that background noise or a muffled mic issue will always disappear.
The trade-off is the one-ear format. It may be convenient for calls, but it will not deliver the same left-and-right listening experience as true wireless earbuds. The listing also gives Bluetooth version 5, whereas the CMF models list version 5.4. I recommend ISCREM for hands-free conversations and a simple single-ear arrangement; I would not choose it primarily for music immersion or spatial sound.
CMF BY NOTHING Buds 2 are true wireless in-ear earbuds with hybrid active noise cancellation and six microphones. For streaming, that combination makes them the most feature-rich option here for someone who wants a conventional two-ear listening experience alongside call-oriented microphone features. The listed AI-powered voice processing and wind-noise reduction are aimed at making calls clearer, while the app provides controls for equalization, bass, and noise cancellation.
The 11 mm dynamic drivers, Dirac Opteo tuning, and spatial-audio effect are geared toward music, films, and games as well as spoken content. Those features do not establish how a microphone will sound on every platform, but they give the Buds 2 a broader listening role than a call-only headset. Bluetooth 5.4 supports wireless use, and Low Lag Mode is listed as an app feature for gaming. If you are searching for the best in ear headphones for streaming, this model is the most complete conventional-earbud option among these four based on its listed audio and call features.
The battery information gives up to 13.5 hours of listening from a single charge and up to 55 hours with the case. A ten-minute top-up is described as providing 7.5 hours of playback. Those are manufacturer-stated figures, not a guarantee for every listening pattern. IP55 water and dust resistance may be useful for workouts or getting caught in light rain, but it is not presented as underwater protection.
The trade-off is that an in-ear fit and active noise cancellation are not for everyone, and adjusting its sound and ANC options involves the Nothing X app. I recommend this version for someone who wants one pair for calls, music, video, and gaming, especially if microphone features and customizable listening matter more than keeping both ears open.
This second CMF BY NOTHING Buds 2 entry has the same core feature set as the Light Green version: true wireless in-ear construction, hybrid noise cancellation, six microphones, Bluetooth 5.4, and app controls. Its listed color is Light Orange. Since the sheets describe matching audio, microphone, battery, and water-resistance specifications, the meaningful distinction here is the listed color rather than a different use case.
For streaming, its six microphones and AI voice-processing features are the most directly relevant details. The listed wind-noise reduction may be useful when a call happens outdoors, while the app’s sound controls allow adjustments to equalization, bass, and noise cancellation. The 11 mm drivers and spatial-audio feature also make it suitable for watching or listening when you are not speaking. As with the other version, those specifications describe intended features rather than guaranteeing a particular microphone result on every device or streaming service.
Battery and durability details are also shared: up to 13.5 hours of listening on one charge, up to 55 hours with the case, and IP55 water and dust resistance. A quick ten-minute charge is stated to provide 7.5 hours of playback. That mix could fit someone who moves between long listening sessions, calls, and workouts, provided the in-ear style is comfortable for them.
The main trade-off is that there is no stated technical difference from the Light Green version beyond color. I would not pay extra or expect better microphone performance based on the supplied specifications; the product details give no basis for that conclusion. Choose this one if Light Orange is your preference, and consider the other CMF listing if you prefer its Light Green option.
We compared the published design, connectivity, microphone-related features, battery information, and intended use for each model.
The order reflects our independent editorial opinion about fit for streaming and call-focused use.
No brand paid for placement.
Among these options, the CMF BY NOTHING Buds 2 models list six microphones, AI-powered voice processing, and wind-noise reduction. ISCREM also lists CVC 8.0 noise reduction for calls. The specifications cannot guarantee a fix for every device, app, or environment.
No. The product information says Bluetooth cannot transmit underwater. You can use the built-in memory to play downloaded audio in MP3 mode while swimming.
The supplied specifications describe the same main features for both. The listed color differs: one is Light Green and the other is Light Orange.
The supplied age descriptions identify the KESIEME and ISCREM products as adult items, while the CMF entries list an all-ages description. None of the sheets provides child-specific fit or safety details, so check suitability for the child before choosing.
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