We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-20 · 5 min read · Independent comparison
If you want a large classroom-ready stash of colorful kid-sized earbuds on a classic 3.5 mm plug, choose Gaosen 50; if you need a smaller set of black on-ear USB-C headphones with a microphone for calls and tests, choose Bulktech 5.
• Gaosen 50 — biggest strength: 50 individually bagged, multi-colored in-ear earbuds with soft silicone tips sized for small ears (students roughly 3–12), all on a standard 3.5 mm wired jack.
• Gaosen 50 — biggest trade-off: it's an earbud, not a headset — no microphone, no inline media control, and no noise isolation, so it's for listening only, and it only fits devices with a 3.5 mm port.
• Bulktech 5 — biggest strength: on-ear design with padded, rotatable ear pads, a built-in mic, and a 1-button remote, on USB-C for plug-and-play with modern Chromebooks, tablets, laptops and Android phones.
• Bulktech 5 — biggest trade-off: only 5 units per pack, and USB-C only — anything with a 3.5 mm jack needs an adapter, which is not included.
• Who Gaosen 50 is for: schools, teachers, camps or programs that need to hand out a lot of cheap listening earbuds to young kids, one per student.
• Who Bulktech 5 is for: a small group — a family, a tutoring pod, a test center or a few office desks — that needs talking-and-listening headphones on USB-C.
The Gaosen 50 is a bulk classroom pack, and it's built around that one job. You get 50 pairs of wired in-ear earbuds, each one individually bagged and sealed, in mixed colors. That sealing detail matters more than it sounds: it means you can hand them out one at a time without the rest getting tangled together or handled by everyone in the room. For a teacher setting up a listening station, a summer program, or a testing day where each kid needs their own set, that's the whole point.
The earbuds themselves are aimed squarely at kids. The silicone tips are soft and compact, and Gaosen describes them as suited to small ears in the roughly 3–12 age range. Audio specs are standard budget territory: 32 ohm impedance, a dynamic driver, and a 20 Hz–20 kHz frequency range. That's not audiophile gear, and it isn't meant to be — it's enough for classroom reading apps, video lessons, and music on a Chromebook, phone, tablet or laptop over the 3.5 mm jack.
Where you should skip it: if you need a microphone. There's no mic and no noise control here — the control type is listed as media control, and noise control is none. So video calls, speech-to-text, and anything where the student has to talk back won't work. It's also a 3.5 mm product, so a device with only USB-C won't take it without an adapter. And if you just need two or three pairs, buying 50 is overkill.
The Bulktech 5 is the opposite shape of product: fewer units, more capability per unit. You get 5 black wired on-ear headphones, each individually wrapped, with padded ear pads that rotate and an adjustable headband. The on-ear fit with those pads gives you passive noise isolation — not active cancellation, just a physical seal that takes the edge off a noisy room — which is genuinely useful in a lab, a library, or a shared office.
The headline feature is the USB-C plug. It's digital audio straight from the connector, so there's no Bluetooth pairing and no dongle needed on USB-C Chromebooks, tablets, laptops and Android smartphones. It also has a built-in microphone and a 1-button remote for calls, play/pause and voice assistant, which is the thing the Gaosen set simply cannot do. The audio specs are otherwise a match for the Gaosen pair: 32 ohm impedance, dynamic driver, 20 Hz–20,000 Hz.
Who it's for: a small group that needs to both listen and speak — online classes, video meetings, test centers, a few shared desks, or a family with several USB-C devices. Who should skip it: anyone with a lot of 3.5 mm-only hardware, since USB-C is the only connection here and no adapter is included. And if you need to outfit 30 students, five units won't get you there.
• Best for large groups → Gaosen 50. 50 units versus 5. If you're outfitting a class, Gaosen wins by sheer count.
• Best for young kids → Gaosen 50. Compact silicone tips designed for small ears, ages roughly 3–12.
• Best for talking, not just listening → Bulktech 5. Built-in mic and 1-button call control; Gaosen has neither.
• Best for modern USB-C devices → Bulktech 5. Plug-and-play on USB-C Chromebooks, tablets, laptops and Android phones.
• Best for older devices with a headphone jack → Gaosen 50. Standard 3.5 mm jack, no adapter needed.
• Best for shared, noisy rooms → Bulktech 5. Padded on-ear pads give passive noise isolation; the earbuds offer none.
• Best for hygiene and easy distribution → a tie, in different ways. Both ship individually wrapped or bagged, so both are easy to hand out one at a time.
• Best for travel and pocketability → Gaosen 50. In-ear earbuds pack down smaller than on-ear headphones.
In my opinion, most people searching these two names are trying to solve one of two problems, and the answer falls out of that. If you're a teacher or program organizer who needs a big pile of kid-friendly listening earbuds, I'd buy the Gaosen 50 — the 50-pack, the small-ear tips and the 3.5 mm jack line up exactly with that job. If you need headphones that also handle a microphone on USB-C for a handful of people, I'd buy the Bulktech 5 instead and accept the smaller count. Pick by your headcount and your port, not by anything else.
Both are aimed at schools, but differently. Gaosen 50 is a 50-pack of listening-only earbuds for young students on 3.5 mm. Bulktech 5 is 5 on-ear USB-C headphones with a mic, better for older students doing online classes or spoken tests.
No. The Gaosen 50 is a listening-only in-ear earbud with no microphone and no noise control. If you need to talk on calls or recordings, the Bulktech 5 with its built-in mic is the one to look at.
No — the Bulktech 5 uses a USB-C connector only, and no adapter is included. For 3.5 mm-only laptops, Chromebooks or phones, the Gaosen 50's standard 3.5 mm jack is the safer fit.
Since neither pack lists pricing here, check the current price on Amazon for each before deciding. Compare the per-unit cost against your headcount: 50 earbuds versus 5 headphones is a big difference in how far one purchase stretches.
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.