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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 large, ready-to-hand-out set of plain wired earbuds for a classroom, library or event, choose Kanayu 100; if you need to connect an existing office headset to a computer through USB, choose Weatwo USB. These two products sit in completely different corners of the audio world, so the "better" one depends entirely on the job in front of you — a hundred pairs of no-frills earbuds versus a single adapter cable that lets a desk phone headset talk to a laptop. Here's how I'd decide.
• Kanayu 100's biggest strength: 100 individually bagged pairs of wired 3.5mm earbuds in black and white (50 of each), giving you instant bulk for classrooms, testing rooms or giveaways — no charging, no pairing, no setup.
• Kanayu 100's biggest trade-off: There is no microphone and no inline controls, so it's listen-only; anyone expecting to take calls or use voice chat will be disappointed.
• Weatwo USB's biggest strength: It converts a USB-A port into an RJ9 phone jack, letting compatible Plantronics, Jabra or Sennheiser wired/DECT headsets work with a computer, laptop, PC or Mac.
• Weatwo USB's biggest trade-off: It's a single adapter, not a headset — you must already own a compatible U10P/RJ9 headset, and some Plantronics models need a compatibility-button tweak on the base.
• Who Kanayu 100 is for: teachers, schools, libraries, event organizers and anyone who needs many cheap, simple earbuds at once.
• Who Weatwo USB is for: office and support staff who want to keep using a professional headset with a softphone or computer.
Kanayu 100 is a bulk pack of wired in-ear headphones built around one clear idea: get a lot of simple, working earbuds into a lot of hands. You get 100 pairs, split across black and white at 50 each, and every pair is individually bagged. That last detail matters more than it sounds. Individually wrapped earbuds are the difference between handing a student a fresh pair and untangling a drawer of loose ones.
Who should buy it? Anyone buying in quantity. A school outfitting a computer lab, a library running loaner headphones, a testing center that needs disposable pairs, a company handing out earbuds at a conference — all of those are natural fits. The 3.5mm plug works with most phones, computers and laptops that still have a headphone jack, so compatibility is broad.
Who should skip it? Anyone who needs to be heard, not just hear. Kanayu states plainly that these have no built-in microphone. There are no inline controls either, and the noise control is listed as none — the description only claims they "block external noise to a certain extent," which is the normal passive isolation of an in-ear tip, not active cancellation. If you need to join calls, dictate notes or use voice chat, this is the wrong product.
Weatwo USB: Who It's For
Weatwo USB is a totally different kind of purchase. It's a short adapter cord — USB-A male on one end, RJ9 phone jack female on the other — measuring about 57.5 cm (1.9 ft). It exists to solve one specific, very common office headache: you have a good professional headset, but the computer you're now working from doesn't have a port that fits it.
The adapter works with most USB-A devices, including desktops, laptops, PCs and Macs. On the headset side, it's built for U10P/RJ9 wired headsets and wireless DECT headsets, with named compatibility spanning Plantronics models like the CS50, CS55, CS540, CS530, CS510, CS520, C054 and C052, Jabra models like the Pro 920, GN9125 and GN9120, and the Sennheiser D10 wireless headset. That's a genuinely useful list for anyone in a call-center or front-desk role.
Build-wise, it's simple and sensible: a PVC shell over high-purity copper conductors, which the brand says provides insulation and toughness for a longer lifespan. It weighs 20 g and is small enough to live in a laptop bag. Weatwo also backs it with a stated 45-day money-back and 1-year guarantee.
Side-by-Side: Which Should You Choose?
• Buying for a group → Kanayu 100. 100 pairs, two colors, individually bagged — it's built for distribution.
• Buying for one desk setup → Weatwo USB. One adapter, one port, one headset.
• Need to talk on calls → Weatwo USB. Kanayu 100 has no microphone at all.
• Need to listen only, cheaply, in volume → Kanayu 100. No mic, no controls, no fuss.
• Already own a Plantronics/Jabra/Sennheiser RJ9 headset → Weatwo USB. That's exactly the scenario it was designed for.
• Devices with a 3.5mm jack → Kanayu 100. It plugs straight in; no adapter needed.
• Devices with only USB-A → Weatwo USB. It bridges the gap for a phone-style headset.
• Long cable run preferred → Kanayu 100. Its cord is about 90 cm versus the adapter's roughly 57.5 cm.
• Low-maintenance, no setup → Kanayu 100. Wired, no pairing, no compatibility checks.
In my opinion, these aren't really competitors — they're answers to two different questions, so I'd pick based on the job. If I were equipping a classroom, lab or event, I'd buy Kanayu 100 without hesitation: it hands you a hundred ready-to-use pairs with no setup and no charging. If I were setting up a work-from-home or office desk and already owned a compatible Plantronics, Jabra or Sennheiser headset, I'd buy Weatwo USB, because it rescues a good headset for computer use for the cost of a cable. My single recommendation for the average shopper reading this page is Kanayu 100, simply because it stands alone as a complete product — Weatwo USB only makes sense once you already own the right headset. Check the current price on Amazon before you commit either way.
No. Kanayu states clearly that these earbuds have no built-in microphone, and there are no inline controls. They're for listening only — lectures, videos, language labs, testing — not for calls or voice chat.
Only if your headset uses a U10P/RJ9 plug. Weatwo lists compatibility with many Plantronics, Jabra and Sennheiser DECT and wired models, but also advises confirming compatibility before buying, since some Plantronics bases need a compatibility-button adjustment.
For students, Kanayu 100 is the practical pick — 100 individually bagged pairs in black and white, a 3.5mm plug that fits most laptops, and nothing to charge or configure. The Weatwo USB adapter is a specialist office accessory, not a student product.
Probably not. They serve unrelated setups. Buy Kanayu 100 if you need many simple earbuds; buy Weatwo USB if you need to connect one compatible headset to a computer. Since neither product's price is shown here, check the current price on Amazon for whichever one matches your need.
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See also: Kanayu 100 vs APETOO USB C Headphones: Wired in Ear Earbuds, Weatwo Single-Side USB Earbud vs JIAMQISHI Headset, Retevis Overhead Walkie Talkie vs Cowyawn USB Type C