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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want the widest device compatibility and a corded earbud that simply plugs into almost anything USB-C, choose Bordsek Earbuds USB-C Headphones; if you need stronger passive noise isolation for commutes, calls and focus work, choose Tanzoizoi USB-C Noise-Cancelling. Both are wired USB-C in-ears with a built-in DAC and no battery to charge — the real split comes down to how much outside noise you want shut out and how broad your device list is.
• Bordsek's biggest strength: an enormous compatibility list covering iPhone 15/16/17 family, Galaxy S20 through S26, Z Fold and Z Flip, Pixel 7 through 10, plus iPad, MacBook and Android USB-C phones — and 14.2mm dynamic drivers with a Hi-Res DAC chip.
• Bordsek's biggest trade-off: it relies on passive noise cancellation only, so it won't mute a bus engine or a loud open office the way a deeper-seal design can.
• Tanzoizoi's biggest strength: a soft silicone seal that its own spec sheet frames as blocking up to 85% of ambient sound, with 16-ohm impedance, a 125cm TPE cable and an in-line volume control.
• Tanzoizoi's biggest trade-off: a narrower official device list (iPhone 15/16/17, Galaxy S22–S25, Pixel 2–8 and select tablets/laptops) and a shorter stated warranty period.
• For whom: Bordsek suits people who own several USB-C devices and want one pair that travels between them; Tanzoizoi suits commuters, call-heavy workers and anyone who wants the outside world quieter.
Bordsek's pitch is breadth. The compatibility list is genuinely long: iPhone 17e, 17 Pro Max, 17 Pro, 17 Air, 17, 16e, 16, 16 Pro Max, 16 Plus, and the iPhone 15 line; Samsung's Galaxy S26 Ultra down through S20 FE, plus Note 20 Ultra, Z Fold 7 to 3 and Z Flip 7 to 3; Google Pixel 10 Pro XL all the way back to Pixel 7; and iPad Pro, MacBook Air M4 and MacBook Pro. If you carry a work laptop, a personal phone and a tablet, that range matters more than any single spec.
Inside, the design is straightforward. A 14.2mm dynamic driver handles a 20Hz–20,000Hz range, and a Hi-Res DAC chip is built in so the digital-to-analog conversion happens in the earbud rather than in your phone. The result, per the spec sheet, is balanced bass, mids and highs. You get three silicone tip sizes (S/M/L) for fit, a 4ft tangle-free cable with a clip, and in-ear passive noise cancellation — meaning the tips physically block some sound, but there's no active processing.
Controls are push-button: a middle button for play/pause and calls, and click patterns for volume up/down and track skipping, plus voice assistant support for Siri, Gemini or Bixby. One practical note straight from the listing: if audio cuts out on some Android devices, enabling "USB audio routing" in Developer Options is the suggested fix.
Buy Bordsek if you want one wired pair that covers a mixed fleet of devices — especially if you're on a recent iPhone or a Galaxy S-series — and you'd rather have a wider tip-tuned fit than a noise-blocking seal. Skip it if your main priority is silencing a noisy commute; that's not what this design is built around.
Tanzoizoi leans into isolation. The silicone tips come in S/M/L and the design is built to create a secure, pain-free seal — the spec sheet describes passive noise cancellation blocking up to 85% of ambient sound. That's the same physical principle as any sealed in-ear (no battery, no active circuitry), but it's the feature this model is explicitly tuned and marketed around, and it's the reason it makes sense for commuters, open-plan offices, podcast recording and DJ monitoring.
The rest of the package is practical. A built-in DAC chip delivers what the sheet calls hi-res audio with rich bass and clear highs, and impedance is listed at 16 ohm — a low figure that generally means the earbuds are easy to drive from a phone or laptop without needing extra power. Cable length is 125cm (about 4.1ft), made from TPE with a metal alloy housing, and the whole thing weighs 25.54g. There's an HD microphone with noise reduction for calls, plus in-line volume, play/pause, track skipping and answer/hang-up buttons.
Compatibility is solid but narrower: iPhone 15, 15 Plus, 15 Pro, 15 Pro Max, 16 and 16 Pro/Plus/Pro Max, 17 and 17 Pro/Pro Max and Air; iPad 10th Gen and iPad Pro; Galaxy S22 through S25 including Plus and Ultra; Pixel 8 down to Pixel 2; plus MacBook, Galaxy Tab and other USB-C laptops and tablets. No driver, adapter or pairing is needed. The listing also states a 0.5-year manufacturer warranty, which is worth knowing up front.
Buy Tanzoizoi if you want maximum quiet from a wired pair and your phone is on the supported list — particularly iPhone 15/16/17, a Galaxy S22–S25 or a Pixel. Skip it if you own an older Pixel, an unusual Android model, or a device outside its list; Bordsek covers more ground there.
• Best for device compatibility → Bordsek Earbuds USB-C Headphones. Its list spans iPhone 15–17, Galaxy S20–S26, Z Fold/Flip, Pixel 7–10, iPad and MacBook.
• Best for blocking outside noise → Tanzoizoi USB-C Noise-Cancelling. Its sealed silicone-tip design is specified to cut up to 85% of ambient sound.
• Best for driver size and headroom → Bordsek Earbuds USB-C Headphones. 14.2mm dynamic drivers with a 20Hz–20,000Hz range and a Hi-Res DAC.
• Best for easy-to-drive, low-impedance use → Tanzoizoi USB-C Noise-Cancelling. 16-ohm impedance is undemanding on phones and laptops.
• Best for cable length → Tanzoizoi USB-C Noise-Cancelling. 125cm versus Bordsek's 4ft (roughly 122cm) — a small but real difference if you move around.
• Best for fitness and movement → Bordsek Earbuds USB-C Headphones. It includes a clothing clip to keep the cable anchored during workouts and runs.
• Best for call-heavy work → Tanzoizoi USB-C Noise-Cancelling. An HD mic with noise reduction and in-line volume control suits conference calls and meetings.
• Best for long-term peace of mind → Bordsek Earbuds USB-C Headphones. Tanzoizoi states a 0.5-year manufacturer warranty; Bordsek's sheet lists no fixed warranty term.
In my opinion, I'd buy the Bordsek Earbuds USB-C Headphones if I owned more than one USB-C device, because that compatibility list is the single most useful thing in this comparison — it's the difference between one pair that works everywhere and one pair that works on some things. I'd pick the Tanzoizoi USB-C Noise-Cancelling instead if my daily reality is a loud train, a busy office or a shared room, because its whole design is aimed at sealing out noise, and 16-ohm impedance keeps it easy to drive. Neither is a bad choice; they're just solving different problems.
No. Both are passive designs — they block sound through the silicone tip seal, not through powered circuitry. Tanzoizoi's sheet specifically states up to 85% ambient sound blocked, and Bordsek lists passive noise cancellation.
If you have an iPhone 15, 16 or 17 series (including 16e, 17e, Air and Pro Max variants), yes — it's on the compatibility list, along with iPad Pro, MacBook Air M4 and MacBook Pro.
No. Both are wired USB-C earbuds with no battery and no Bluetooth pairing, so there's nothing to charge and no dropouts to worry about.
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