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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a wireless, open-ear set for running, commuting and calls, choose Micool Open Ear Headphones; if you need to equip a whole classroom or computer lab with wired on-ear headphones on a per-seat basis, choose Hengliyuan 50. These two share almost nothing except the words "on ear" in their listings — one is a single pair of Bluetooth clip-style earphones with a charging case, the other is a bulk box of fifty wired headsets built for schools. So the real question isn't which is "better." It's which job you're actually shopping for.
• Micool Open Ear Headphones — biggest strength: a genuinely modern wireless setup: Bluetooth 5.4, ANC + ENC noise reduction, 4 microphones, an 18-hour single-charge battery and up to 52 hours total with the charging case.
• Micool Open Ear Headphones — biggest trade-off: it's one pair for one person, with no headband and no 3.5 mm jack, so it can't be shared or plugged into a wired-only device.
• Hengliyuan 50 — biggest strength: fifty wired on-ear headsets in one box, each with a 3.5 mm plug and a 1.2 m cable, built specifically for classrooms, libraries and Chromebooks.
• Hengliyuan 50 — biggest trade-off: no Bluetooth, no battery, no noise cancelling — it's a plug-in-and-listen tool, not a personal audio upgrade.
• Who each pick is for: Micool for one person who wants wireless open-ear audio for sport and calls; Hengliyuan for a teacher, school or lab that needs to seat a room full of students.
The Micool is an open-ear, clip-on style headphone — the kind that hangs over the ear rather than sealing it. Micool describes a sponge earcup design that doesn't compress the ear, and the housing itself is small: roughly a 36 mm diameter, which is the sort of thing you notice if you've ever given up on bulky on-ear cups mid-run. The earpiece shape is listed as on-ear, the enclosure is ABS plastic in a shiny black-silver finish, and the drivers are 27 mm dynamic units with a 20 Hz–20 kHz range and 16 ohm impedance.
The feature list is where it earns its place. Bluetooth 5.4 handles pairing and connection stability, and Micool pairs that with ANC plus ENC adaptive noise reduction and four microphones, which is aimed squarely at call clarity — the ENC side is about suppressing background noise on your voice, so this is a set that thinks about the person on the other end of the line, not just your music. Controls are push-button on each earpiece, so you're not reaching for your phone mid-stride.
Battery is the headline number: up to 18 hours of music on a single charge, and up to 52 hours total when you count the charging case. The case charges over USB-C and has a four-stage indicator light, each stage standing for 25% of remaining case capacity. That's a genuinely useful detail — you can see how much backup you have left before you leave the house.
Hengliyuan 50: Who It's For
The Hengliyuan 50 is a completely different animal, and the name tells you why: it's a 50-pack. This is a classroom set — fifty wired on-ear headsets, each with a 3.5 mm plug and a 1.2 m (about 47 inches) PVC cable. That cable length matters more than it sounds. It's the difference between a kid being able to sit back at a desk or shift to a Chromebook without yanking the plug out of the port.
Everything about the design points at durability under heavy, careless use. The 3.5 mm plug has what Hengliyuan calls a special reinforcement process, and the brand claims that extends usable life by at least 6 to 12 months — a claim aimed at exactly the failure point that kills cheap classroom headsets, the plug and cable. The headband is retractable, so it adjusts from child to adult head shapes, and the earcups swivel, which makes them easier to stack and store between classes. The ear cushions are soft sponge, the housing is plastic, and the whole thing is built to be lightweight rather than premium.
On the audio side, the numbers are modest and honest: 32 ohm impedance, 92 dB sensitivity, and sound isolation rather than active noise cancellation. There's a touch controller for media. There's no Bluetooth and no battery at all — it's a passive wired headset, which in a classroom is a feature, not a limitation. Nothing to charge, nothing to pair, nothing to lose.
Who should buy it? Teachers, school IT staff, librarians, testing coordinators and anyone running a computer lab with Chromebooks, laptops or desktops. If you need thirty kids listening at once without a setup session, this is the shape of product you want. Who should skip it? Basically any individual buyer. If you want one pair for yourself, for music, for running or for calls, a box of fifty wired headsets is the wrong purchase, no matter how good the per-unit math looks.
Side-by-Side: Which Should You Choose?
• Best for wireless freedom → Micool Open Ear Headphones. Bluetooth 5.4, no cable, a charging case that takes total listening to 52 hours.
• Best for a classroom or lab → Hengliyuan 50. Fifty headsets, fifty 3.5 mm plugs, ready for a full room at once.
• Best for battery life → Micool Open Ear Headphones. 18 hours per charge, up to 52 hours with the case; the Hengliyuan has no battery because it needs none.
• Best for fit across ages → Hengliyuan 50. The retractable headband is designed to span child and adult head shapes, and the earcups swivel for storage.
• Best for durability under rough handling → Hengliyuan 50. Reinforced 3.5 mm plug and PVC cable, with a stated aim of lasting 6–12 months of classroom use.
• Best for comfort during movement → Micool Open Ear Headphones. The sponge earcup and small 36 mm housing are designed to avoid pressing on the ear, which matters when you're moving.
• Best for plug-and-play with zero setup → Hengliyuan 50. Wired, no pairing, no charging, no app.
• Best for one person who wants an upgrade → Micool Open Ear Headphones. It's a personal audio product; the Hengliyuan is infrastructure.
If you're buying for yourself, I'd take the Micool Open Ear Headphones. Bluetooth 5.4, ANC and ENC with four mics, an 18-hour battery stretching to 52 hours with the case, and an open-ear sponge fit designed not to press on your ears — that's a coherent, current package for running, commuting and calls, and it's the one of these two that actually solves a personal listening problem.
The Hengliyuan 50 only makes sense if your problem is "I need fifty kids listening at once." In that scenario I'd recommend it without hesitation: wired, reinforced at the plug, adjustable, with a one-year warranty and a 50-unit count that matches a real classroom. But as a pair of headphones for one person, it isn't competing — it's a different category entirely.
Check the current price on Amazon before you commit, since the two sit in very different budget worlds.
how to fit on ear headphones
On-ear models rest against the outside of your ear rather than around it, so fit is about angle and pressure, not sealing. The Hengliyuan 50 uses a retractable headband that adjusts for both child and adult head shapes, so you extend it until the sponge cushions sit flat against your ears without squeezing. The Micool clips over the ear instead, and its sponge earcup and small 36 mm housing are designed to sit lightly without compressing the ear.
how to open ear headphones
"Open ear" means the driver sits outside your ear canal, so you hear your music and your surroundings at the same time. The Micool is built this way — the earpiece hangs over the ear rather than plugging into it, which is why it suits running and cycling where you want awareness of traffic. Because nothing is sealed, you won't get the isolation of a closed cup; that's the trade-off you're accepting.
how to clean on ear headphones
Wipe the plastic housing and cushions with a soft, slightly damp cloth, and avoid soaking the drivers or the ports. The Micool's charging case and USB-C port should stay dry, and its sponge earcups shouldn't be saturated. The Hengliyuan 50 has soft sponge cushions and a plastic frame, so spot-cleaning the cushions between classes is the practical routine — especially when fifty headsets are being shared.
how to ear headphones
If you mean how to wear them: the Hengliyuan 50 goes on with the retractable headband over the top of your head and the swivel earcups resting on your ears. The Micool goes on by hooking each earpiece over the top of your ear so the sponge sits against it, with push-button controls on each side for music and calls. Neither requires an app or a pairing step beyond the Micool's Bluetooth 5.4 connection.
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