We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-22 · 7 min read · Independent comparison
If you want a bigger count of individually wrapped, adjustable over-ear headphones for a classroom set, choose Yunsailing 18; if you need a slightly larger pack of lightweight on-ear headphones that fold away for storage and travel, choose Flutesan 20.
• Yunsailing 18 — biggest strength: Each of the 18 pairs arrives individually wrapped and ready to hand out, with adjustable over-ear cups and a 90-degree rotating, folding design.
• Yunsailing 18 — biggest trade-off: It's the smaller pack of the two, and it carries no active noise control, so it's a straightforward passive listen.
• Flutesan 20 — biggest strength: You get 20 pairs in one go, and the compact on-ear build with sound isolation suits libraries and shared listening stations.
• Flutesan 20 — biggest trade-off: It doesn't advertise per-pair individual wrapping the way the Yunsailing set does, and the fit is on-ear rather than over-ear.
• Who each pick is for: Yunsailing 18 for teachers and event organizers who want individually wrapped adjustable over-ears; Flutesan 20 for anyone who needs a larger count of compact, portable on-ears for mixed-age users.
The Yunsailing 18 is built around classroom logistics first. You get 18 pairs, and each one is wrapped individually in its own bag. If you've ever tried to hand out a shared set of headphones to a room of students, you know why that matters — nobody has to guess whose pair is whose, and you can distribute them fast without untangling a communal pile. In my opinion, that single detail is what makes this set feel purpose-built for schools rather than just "a lot of cheap headphones in a box."
On the fit side, the Yunsailing 18 is an adjustable over-ear headphone. The headband adjusts to sit properly on different head sizes, and the ear cups rotate 90 degrees and fold for storage. That folding trick is quietly useful: they drop into a drawer or cabinet without eating much space between classes. The ear pads are PU leather over soft padding, which is the kind of surface that wipes down reasonably well and feels less scratchy than bare plastic on a longer listening session. The shell is ABS and the cable is PVC, about 1.2 meters (roughly 3.94 feet) long — long enough to reach a laptop on a desk without yanking the cups off your head.
Audio-wise, the Yunsailing 18 uses a dynamic driver with a 20 Hz to 20,000 Hz frequency range, and the spec sheet calls out clear sound at a maximum output between 95 and 101 decibels. That's a loud ceiling — loud enough for noisy rooms, but the sheet frames it as not harsh for everyday use. The plug is a standard 3.5 mm jack, so it works with phones, desktops, laptops, fitness equipment and testing hardware. Controls include media and volume control via a remote on the cable, though there's no noise control listed.
Who should buy it: teachers assembling a class set, testing centers, hotels, and event organizers who want individually wrapped, adjustable over-ear headphones that store compactly. Who should skip it: anyone who needs more than 18 units in one purchase, or a listener who specifically wants active noise cancellation — the Yunsailing 18 doesn't offer it.
The Flutesan 20 takes the opposite approach: more units, lighter footprint. You get 20 pairs in white, which suits libraries, computer labs and any shared station where you want a consistent, clean-looking set. The cable runs about 1.2 meters (roughly 4 feet) — effectively the same reach as the Yunsailing set — so students and patrons can sit back from a desktop without pulling the plug.
The big structural difference is the fit. The Flutesan 20 is an on-ear headphone: the cups rest against the ear rather than surrounding it. The data sheet lists the earpiece shape as on-ear and the ear placement as "In Ear," which in practice means a smaller, tighter profile than a full over-ear cup. The upside is a compact, lightweight build that's easy to stash in a car, home or office, and easy to carry around. The enclosure is ABS with foam padding, and the color is white.
One feature worth highlighting: the Flutesan 20 lists sound isolation as its noise control type. That's passive isolation, not active cancellation — the closed on-ear design naturally blocks some ambient noise rather than electronically canceling it. For a library or a quieter study room, that's genuinely useful. It also uses a dynamic driver with the same 20 Hz to 20,000 Hz range as the Yunsailing set, so neither has a frequency-range advantage on paper.
The manufacturer notes that this set works well as a gift or supply for family, classmates and neighbors — it's positioned as a general-purpose bulk headphone, not strictly a school item. There's one caution in the listing: winding risk exists, and children under 3 should be supervised. So if you're buying for very young kids, keep that in mind.
Side-by-Side: Which Should You Choose?
• Best for individually wrapped, ready-to-hand-out sets → Yunsailing 18. Each of the 18 pairs comes bagged on its own.
• Best for the highest unit count → Flutesan 20. Twenty pairs versus eighteen.
• Best for adjustable over-ear fit → Yunsailing 18. An adjustable headband plus 90-degree rotating, folding cups.
• Best for compact, portable storage → Flutesan 20. Lightweight on-ear build designed to tuck into a car, office or bag.
• Best for passive noise blocking → Flutesan 20. It lists sound isolation; the Yunsailing 18 lists no noise control.
• Best for long, tangle-resistant daily handling → Yunsailing 18. PVC cable and ABS shell, described as sturdy and reusable rather than disposable.
• Best for a mixed group of kids and adults → Flutesan 20. Positioned for boys, girls and adults as a general supply or gift.
• Best for full-ear coverage comfort → Yunsailing 18. PU leather pads over an over-ear cup rather than an on-ear pad.
If I were outfitting a classroom or a testing room and had to pick one, I'd buy the Yunsailing 18. In my opinion, the individually wrapped pairs and the adjustable over-ear design solve the two problems that actually bite you in a shared setting: hygiene and fit. The folding cups are a bonus for storage. That said, I'd steer toward the Flutesan 20 if I needed twenty units, wanted something lighter to carry around, or valued the passive sound isolation of an on-ear design. Both share the same 3.5 mm plug and the same 20 Hz to 20,000 Hz range, so the real decision comes down to pack size, wrapping and ear-cup style — not sound specs. Check the current price on Amazon before you commit, since bulk pricing shifts.
FAQ
how to adjust headphones
how to adjust headphones volume
Volume on both sets is handled on the source device — your phone, laptop or computer. The Yunsailing 18 also lists media and volume control through a remote on its cable, so you can nudge the level without reaching for the device. The Flutesan 20 doesn't list a cable remote, so you'd adjust volume on the connected device itself.
how to adjust headphones sound
Neither model offers an equalizer or sound-tuning control. Your sound adjustment comes from the source: the app or operating system's audio settings. Both use a dynamic driver with a 20 Hz to 20,000 Hz range, so their tonal character is set by the build and the ear-cup style — over-ear on the Yunsailing 18, on-ear with sound isolation on the Flutesan 20.
how to adjust headphones on iphone
Both headphones use a standard 3.5 mm jack, so on an iPhone you'd need an appropriate adapter, since current iPhones don't have a headphone socket. Once connected, adjust volume with the phone's buttons or on-screen slider. The Yunsailing 18's in-line remote may not control volume through every adapter, so use the phone's own controls if it doesn't respond.
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