How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a whole classroom or a big family supplied in one go, choose XOSDA 50; if you need one genuinely kid-safe pair of over-ear headphones with a real volume ceiling, choose acer OHW355. That's the honest split between these two, and it's a bigger gap than the word "cheap" suggests.
• XOSDA 50 biggest strength: You get 50 wired in-ear pairs in a single box, all with standard 3.5mm jacks — instant coverage for a class, a school lab or a household of kids.
• XOSDA 50 biggest trade-off: No volume limiting at all, plastic-and-silicone in-ear buds, and a per-unit feel that suits "shared and replaced" more than "treasured and protected."
• acer OHW355 biggest strength: A physical 74/85dB limiter that holds output down even when the source device is maxed out, plus over-ear comfort and a braided tangle-free cable.
• acer OHW355 biggest trade-off: It is a single pair, and the design is aimed squarely at younger children rather than a full class set.
• Who XOSDA 50 is for: Teachers, tutors, school IT buyers and parents who need many cheap headphones at once.
• Who acer OHW355 is for: A parent buying one pair for one child's ears — especially ages 3–7.
The XOSDA 50 is a bulk proposition first and a headphone second. One box contains 50 identical white in-ear buds, model XPG101, each with a standard 3.5mm jack. That single fact decides almost everything about it: it is built to solve the problem of "thirty kids, thirty Chromebooks, thirty missing earbuds" rather than to be anyone's favourite pair of headphones.
On the audio side the specs are modest but entirely normal for the category — 32 ohm impedance, a dynamic driver, and a 20Hz–20kHz frequency range, which is the standard full-range claim you'll see on virtually every wired earbud at this level. The housing is plastic with silicone tips, and XOSDA emphasises stronger wiring, durable plastics and reinforced 3.5mm connectors. That's the right set of priorities for something that gets coiled, stuffed into a pencil case and yanked out of a laptop port by a nine-year-old. The in-ear shape also means no headband to snap and no earcups to crack.
Who should buy it? Anyone buying in volume. A teacher kitting out a classroom set, a school technician replacing a drawer of dead buds, a tutor running small group sessions, or a parent with several children who all need something for remote lessons. The 3.5mm jack covers classroom desktops, laptops, Chromebooks, tablets and phones without adapters, which is exactly what you want when you're plugging in dozens of devices at once.
Who should skip it? If you're buying for one young child and you care about hearing protection, this isn't the pick. There's no noise control, no volume limiter, and the in-ear fit is something a small child may fiddle with. It's also worth noting the plug is wired only — the "wireless technology: FM" field is a listing quirk, not a Bluetooth feature — so don't expect to pair it with anything. There's a 12-month warranty and a stated 12-hour support reply window, which is reassuring when you're buying a batch, but it doesn't change what the product is: a volume purchase.
The acer OHW355 is the opposite approach: one pair, designed carefully, for one small head. The headline feature is the volume limiter. It offers two physical settings — 74dB for ages 3–7 or sensitive ears, and 85dB as the higher option — and critically, the limiter is physical, so it holds output at that ceiling even if the connected device is turned all the way up. Acer frames the 74dB mode as the differentiator, noting that most kids' headphones only offer a single 85dB limit. For a parent worried about a child wearing headphones for a two-hour online lesson or a long car journey, that's the single most useful thing on this spec sheet.
Comfort is the second pillar. These are over-ear headphones with 90° rotatable earcups, soft skin-friendly padding and an adjustable headband, so they can be shaped to different head sizes and face contours. Over-ear also means nothing is pushed into the ear canal — a meaningful difference for a five-year-old who won't tolerate earbuds. The cable is high-density nylon braided, which Acer says resists tangling and handles daily abuse better than ordinary PVC, and the body is ABS plastic. Both are sensible choices for something that lives in a school bag.
Sound is handled by 40mm dynamic drivers with a 20Hz–20kHz range, 32 ohm impedance and 85dB sensitivity. Acer describes the tuning as balanced stereo — clear vocals, smooth treble, moderate bass — which is the right call for spoken-word content like stories and online lessons rather than bass-heavy music. The 3.5mm jack is plug-and-play with Kindle Fire tablets, PCs, learning devices and Switch.
Who should skip it? Anyone who needs quantity. This is one pair in pink, sized and styled for children. If you're equipping a classroom of thirty, buying thirty of these is a very different purchase than one box of the XOSDA 50. And if your listener is a teenager or an adult who just wants cheap everyday buds, the 74dB mode will feel restrictive and the kid-focused styling won't appeal.
• Best for buying in bulk → XOSDA 50. 50 pairs in one box versus a single pair.
• Best for hearing safety → acer OHW355. The physical 74/85dB limiter is the decisive feature here; the XOSDA 50 has no volume limiting at all.
• Best for young children (roughly ages 3–7) → acer OHW355. The 74dB mode and over-ear fit are built for exactly this group.
• Best for classrooms, labs and Chromebook carts → XOSDA 50. Volume, a universal 3.5mm jack and reinforced connectors are what a shared set needs.
• Best for long listening sessions → acer OHW355. Over-ear padding, rotatable earcups and an adjustable headband beat in-ear buds for marathon use.
• Best for cable longevity → acer OHW355. Nylon braiding and a tangle-resistant surface are a real advantage over a standard thin wire.
• Best for travel and portability → XOSDA 50. In-ear buds take up almost no space; the acer pair is a foldable but still bulky over-ear.
• Best for replacing lost or broken units cheaply → XOSDA 50. With 50 identical pairs, attrition is a non-event.
If I were buying for one child, I'd take the acer OHW355 without hesitating. The physical 74dB limiter, the over-ear comfort and the braided cable are three concrete design decisions that matter every single day, and no amount of quantity compensates for a missing volume ceiling on a young child's ears.
If I were equipping a class, I'd buy the XOSDA 50 instead, because the acer's advantages are per-child features and the XOSDA's advantage is coverage. In my opinion these two aren't really competitors — they're answers to two different questions. Pick the question you're actually asking, then check the current price on Amazon before you commit.
FAQ
You don't — both of these are wired. The XOSDA 50 and the acer OHW355 each use a standard 3.5mm jack, so you simply plug them into a laptop, Chromebook, tablet or phone. No pairing, no charging, no battery to run flat.
Stick to the basics the specs actually promise: 32 ohm impedance and a 20Hz–20kHz range on both models, which means they'll drive fine from a phone or laptop without an amp. On the acer, the 40mm drivers are the larger hardware. Beyond that, fit matters more than anything — a proper seal on the XOSDA's silicone tips, or a correct over-ear fit on the acer.
Start with fit: seat the XOSDA's silicone tips properly, and adjust the acer's rotatable earcups and headband so the drivers sit correctly. Then keep the source volume sensible and, if your device has one, use its equaliser rather than pushing the volume up. Remember the acer's limiter will cap output at 74dB or 85dB regardless of what you do at the source.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: JBL Quantum 100 vs FIFINE H9, TOZO NC9 vs Ertuly T33: Hybrid ANC Earbuds, SIAWAG Earbuds 5.4 vs WOSHIFUPO Headset: Multipoint Pairing, EPOS H3 vs MAONO DGM20S