We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-02 · 7 min read · Independent comparison
If you want one pair of headphones that keeps your ears open while you run, swim and ride — with music stored on board when your phone stays home — choose Voistek Bone Conduction Headphones; if you need a wired in-ear set built around detailed, high-resolution listening and a swappable cable, choose TANGZU Shangguan Wan'er II. These two share almost nothing except the word "headphones," which is exactly why the decision is easier than it first looks.
• Voistek's biggest strength: a fully self-contained sports system — open-ear bone conduction, Bluetooth 5.3, a 32GB built-in MP3 player, IP68 sealing to 6 feet for 2 hours, and 8 hours of playtime per charge.
• Voistek's biggest trade-off: it uses no in-ear seal, so it gives you awareness and water resistance instead of isolation — and its noise control is listed as None, meaning it won't shut the world out.
• TANGZU's biggest strength: an audiophile-oriented wired design — a 10mm dynamic driver, 19 ohm impedance, 113.5 dB sensitivity, a zinc alloy cavity and a detachable 0.78mm 2-pin OFC cable.
• TANGZU's biggest trade-off: it is wired only (Type C with Mic), so there's no Bluetooth and no phone-free playback — it needs a source device attached at all times.
• Pick Voistek if you train outdoors, swim, or want music without carrying a phone.
• Pick TANGZU if you listen at a desk, in a studio, or on a commute and care most about sound quality and cable flexibility.
The Voistek is a sports tool first and a music device second, and the spec sheet reads that way. Bone conduction drivers sit outside your ear canal and vibrate through your cheekbone, so your ears stay completely open. That single design choice explains everything else: you hear traffic on a city ride, trail sounds on a hike, and your surroundings in a crowded gym. The listing also mentions LED strips that glow red for night visibility, which pairs sensibly with the open-ear approach — the point is that you're never sealed off from your environment.
Then there's the storage. A 32GB internal MP3 player is unusual in this category, and it means the Voistek can work with no phone at all. If you swim laps, run mountain trails, or train anywhere your phone signal or your phone itself is a hassle, you load your music once and leave the handset behind. The IP68 rating backs that up: immersion up to 6 feet for 2 hours covers lap swimming, snorkeling and heavy rain. Playtime is listed at 8 hours, and the quick-charge figure is genuinely useful for athletes — 15 minutes of charging returns about 2 hours of music, so a forgotten charge before a workout isn't fatal.
Comfort is handled by a titanium frame that flexes to fit different head sizes, from teens up to XXL helmet wearers, with soft skin-contact pads. At 32g it's light enough to forget during a long session. Bluetooth 5.3 with a 15-meter range handles daily wireless use, and voice control covers Google Assistant and Siri, with button and volume controls on the frame. The 2-year warranty is the longest of the two.
TANGZU Shangguan Wan'er II: Who It's For
The TANGZU Shangguan Wan'er II comes at headphones from the opposite direction. It's an in-ear monitor built for listening, not for surviving a rainstorm. The headline number is a 10mm TPLX dynamic driver with an impedance of just 19 ohm and sensitivity of 113.5 dB — a combination that tells you it's easy to drive from a phone, a dongle, or a laptop without needing a dedicated amplifier. Frequency response is listed to 20 kHz, and the design language is clearly audiophile: a zinc alloy cavity with a hand-polished finish, paired with a resin enclosure.
The cable is the part I'd highlight most. It's a detachable 0.78mm 2-pin OFC cable, so if the wire eventually fails — the most common way any wired earphone dies — you replace the cable, not the earphones. That's real longevity. Connectivity is Type C with a microphone, so there's no Bluetooth, no dongle-free wireless, and no internal storage. It needs to be plugged into something. In exchange you get zero latency, no pairing, no battery anxiety, and passive noise cancellation and sound isolation from the in-ear fit.
Fit and comfort are addressed with skin-friendly medical resin and an oval earpiece shape, and the package includes six pairs of silicone eartips, which matters because in-ear sound quality is largely a function of getting a proper seal. There's also a blue carrying case measuring 6 x 6 x 3 inches at 0.16 kg, plus a decorative card for a headphone stand. The warranty is 1 year.
Who should buy it: desk listeners, gamers, DJs, office workers and anyone who wants detailed wired sound with a replaceable cable. Who should skip it: swimmers, open-water athletes, and anyone who needs wireless freedom or phone-free playback — the TANGZU simply can't do those things.
Side-by-Side: Which Should You Choose?
• Best for water and sweat → Voistek Bone Conduction Headphones. IP68 means immersion to 6 feet for 2 hours; the TANGZU is not rated for water at all.
• Best for sound quality and detail → TANGZU Shangguan Wan'er II. A 10mm dynamic driver at 19 ohm and 113.5 dB sensitivity is built for clean, easy-to-drive listening.
• Best for blocking out noise → TANGZU Shangguan Wan'er II. In-ear passive noise cancellation and sound isolation do what the Voistek's open design deliberately avoids.
• Best for battery life and untethered use → Voistek Bone Conduction Headphones. 8 hours per charge, a 1.5-hour full charge, and Bluetooth 5.3 with 15-meter range.
• Best for zero-latency wired reliability → TANGZU Shangguan Wan'er II. A Type C wired connection with a detachable 0.78mm 2-pin OFC cable that you can replace instead of discarding the earphones.
• Best for travelling light without a phone → Voistek Bone Conduction Headphones. The 32GB player holds thousands of tracks for signal-free zones.
• Best for long-term repairability → TANGZU Shangguan Wan'er II. The swappable cable is a genuine durability advantage over sealed wireless designs.
In my opinion, the honest answer is that these aren't competitors at all — they solve different problems, so the right move is to buy based on your dominant use case, not on a vague sense of which is "better." If I had to choose one for the majority of buyers reading this, I'd take the Voistek Bone Conduction Headphones. The combination of IP68 waterproofing, an open-ear safety design, 8 hours of playtime, a 32GB player and a 2-year warranty covers a far wider range of real-world situations — workouts, commutes, swimming, travel — and it works with or without a phone. The TANGZU Shangguan Wan'er II is the better listening device and the smarter pick if sound quality and a replaceable cable are what you wake up thinking about. But it's a wired in-ear, and that limits where it can go.
Two different things get called "pairing multiple headphones." If you mean connecting more than one set to a single source, that depends on the source device, not the headphones — many phones and laptops allow only one active audio output at a time. If you mean keeping several headphones paired so you can switch between them, each device stores its own pairing list. The Voistek here connects over Bluetooth 5.3; the TANGZU is wired, so it never pairs at all.
How to pair multiple headphones iPhone?
It works the same way as iPhone — pair each set once in Settings, then choose your active output. An iPad with a USB-C port can also run the TANGZU Shangguan Wan'er II directly through its wired Type C connection with mic, which sidesteps pairing entirely and gives you zero-latency audio.
You can't stream one audio source to two Bluetooth headphones simultaneously on most consumer devices. The practical approach is to pair each headphone individually and swap the active connection when you switch. Worth noting: the Voistek is the only one of these two that uses Bluetooth at all, so if wireless multi-device juggling is your goal, that's your candidate. If you want to check what either one costs right now, use the price button on this page.
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