We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-20 · 7 min read · Independent comparison
If you want a pair of wired sleep earbuds built specifically to disappear into your ear at night, choose Hmusic USB C; if you need a durable, kid-friendly pair of wired headphones for school, travel and daily listening, choose iClever C371.
These two products share exactly one thing: a USB-C plug. Beyond that, they are aimed at completely different people. The Hmusic USB C is a 2-gram in-ear sleep bud with a flat, side-sleeper-friendly shape and passive noise isolation. The iClever C371 is a 40mm over-ear kids' headphone with a foldable headband and volume-limiting SafeSound tech. Comparing them is really a question of what job you're hiring them to do — sleep and quiet focus, or safe everyday listening for a child.
• Hmusic USB C — biggest strength: A 2g-per-bud, flat "snail" shape with 45° ear fins that stays flush to the ear, so side sleepers aren't fighting pressure points. It's built for lying down.
• Hmusic USB C — biggest trade-off: It's an in-ear bud with sound isolation only — no active noise cancellation and no volume limiter. If you want over-ear coverage or child-safe volume caps, this isn't it.
• iClever C371 — biggest strength: Over-ear 40mm dynamic drivers, a foldable and durable ABS headband, and SafeSound Tech 3.0 aimed at protecting kids' hearing. It's built for school bags and car rides.
• iClever C371 — biggest trade-off: It's over-ear and bulky relative to a sleep bud, and it's explicitly designed for kids. If you want something that vanishes in your ear at 2 a.m., this is the wrong tool.
• Who each pick is for: Hmusic USB C for side sleepers, snorer-adjacent sleepers, and anyone who wants wired audio during rest, reading or travel. iClever C371 for parents buying a first proper pair of headphones for a child.
The Hmusic USB C is a sleep-first product, and almost every design decision points at that. Each earbud weighs just 2 grams and uses a patented flat, snail-inspired shape with 45° ergonomic ear fins. That combination matters because the classic complaint about sleeping in earbuds isn't sound quality — it's the hard plastic shell digging into your ear when you roll onto your side. A flat profile that sits flush against the ear is the whole point here.
The audio side is built around blocking out the world rather than thrilling you. Hmusic claims a dual-layer acoustic design that cuts ambient noise by up to 30dB at 1kHz under lab conditions, and the pitch is straightforward: instead of trying to out-shout snoring or background chatter, you play lullabies or white noise and let the isolation do the rest. Inside is a 6mm dynamic driver with an 18-ohm impedance and a 20Hz–20,000Hz frequency range — modest specs that are perfectly reasonable for spoken-word audio, ambient tracks and sleep playlists, which is exactly what this bud is for.
Practical details round it out. The cord is 1.2 meters of oxygen-free copper wrapped in TPE, which is a sensible length for a bedside table, a plane seat or a reading chair, and the inline button control gives you playback control plus a mic for calls. It's a USB-C wired connection, and Hmusic states compatibility with roughly 99% of USB-C phones and tablets, including recent iPhones, Samsung and Pixel devices — though you should confirm your own device before buying, since there's no adapter in the box and no Bluetooth fallback. The package includes a velvet pouch, and there's a 1-year warranty.
Buy it if you sleep on your side, share a bed with a snorer, or want a wired bud for meditation, audiobooks, long flights and quiet focus. Skip it if you need active noise cancellation, over-ear coverage, or a volume-limited pair for a young child.
The iClever C371 is a kids' headphone through and through, and it says so plainly in its own product description: for school, boys and girls, travel. It's an over-ear design with 40mm dynamic drivers, 32-ohm impedance and a 20,000Hz frequency response. That's a fundamentally different listening proposition from a 6mm sleep bud — bigger drivers, an over-ear fit, and enough output headroom to actually enjoy music, videos and classroom content.
The headline feature is SafeSound Tech 3.0, iClever's volume-limiting system designed to keep output at child-appropriate levels. For a parent, that's the reason to pick this over a generic pair of headphones: the safety logic is baked in rather than left to a child's judgment. The build supports the same story. The headband is durable ABS, the whole thing folds for storage, and it's described as lightweight despite an item weight of 5.6 ounces — reasonable for an over-ear set that has to survive being shoved into a backpack.
Controls are handled with a simple in-line module, and the connection is wired USB-C, which suits school tablets, laptops and family devices that increasingly ship without a headphone jack. There's no noise cancelling here — noise control is listed as none — and that's arguably the right call for a kid's headphone, since blocking the world out isn't the goal. You get a 24-month warranty, which is a notably longer coverage window than the Hmusic's 1 year, and the Cloud Pink colorway signals the intended audience clearly.
Buy it if you're outfitting a child for school, travel or home learning and want volume limiting, over-ear comfort and a folding design. Skip it if you're an adult looking for something to sleep in, or you want a compact in-ear fit.
• Best for sleeping on your side → Hmusic USB C. The 2g weight, flat snail shape and 45° ear fins exist specifically to remove side-sleeping pressure.
• Best for blocking out a snoring partner → Hmusic USB C. Up to 30dB of passive isolation at 1kHz, designed to pair with white noise rather than fight the noise.
• Best for a child's school bag → iClever C371. SafeSound Tech 3.0, a foldable ABS headband and a kid-specific design brief.
• Best for hearing-safety peace of mind → iClever C371. Built-in volume limiting is the core feature; the Hmusic has none.
• Best for music and video enjoyment → iClever C371. 40mm drivers and an over-ear fit versus a 6mm in-ear bud tuned for sleep audio.
• Best for adults who want wired audio at rest → Hmusic USB C. Meditation, audiobooks, flights and reading are all named use cases, and the 1.2m cord suits them.
• Best for long-term coverage → iClever C371. 24-month warranty versus the Hmusic's 1 year.
• Best for a compact, packable pair → Hmusic USB C. Two grams per bud and a velvet pouch beat an over-ear headphone for pocketability.
• Best for calls → Hmusic USB C. The inline control includes a mic; the iClever's in-line module handles controls but no mic is specified.
If I had to buy one for myself, I'd take the Hmusic USB C. My reason is simple: its entire design exists to solve one specific, annoying problem — sleeping and resting with audio in your ears — and the flat shape, 2g weight and 30dB isolation all serve that goal directly. The iClever C371 is the better headphone in the conventional sense, with bigger drivers and a longer warranty, but it's a kids' product and I'm not its buyer. If you're shopping for a child, flip that recommendation entirely. Either way, check the current price on Amazon before you commit, and confirm your device has a USB-C port, because neither of these has a Bluetooth option.
The Hmusic USB C, clearly. It's a 2g in-ear bud with a flat design made for side sleepers and up to 30dB of passive noise isolation. The iClever C371 is an over-ear kids' headphone — not something you'd wear in bed.
You can, and it will work, but it's designed for children — the SafeSound Tech 3.0 volume limiting and kid-oriented build are the point. If you want over-ear headphones for an adult, this isn't the model aimed at you.
Both are wired USB-C. Hmusic states compatibility with around 99% of USB-C devices, including recent iPhones, Samsung and Pixel phones, plus tablets and laptops. The iClever C371 is also USB-C wired. Check your specific device first — there's no wireless mode on either.
For music, the iClever C371 has the hardware advantage: 40mm dynamic drivers versus the Hmusic's 6mm. But the Hmusic's 18-ohm impedance and 6mm driver are tuned for sleep audio and spoken word, where big drivers aren't the goal.
The iClever C371 pairs a durable ABS headband and folding design with a 24-month warranty. The Hmusic USB C uses a TPE-wrapped oxygen-free copper cord and carries a 1-year warranty. For heavy daily handling by a child, the iClever has the edge.
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