We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-29 · 6 min read · Independent comparison
If you want all-day battery life with a charging case that doubles as a power bank and a screen that shows you exactly how much juice is left, choose VOLT PLUS TECH PRO; if you need headphones you can actually swim in, with open-ear awareness and a built-in MP3 player that works without your phone, choose Laoziniu Bone Conduction Headphones.
• VOLT PLUS TECH PRO — biggest strength: a 2,000 mAh Power Recharge Case rated for up to 36 hours of total listening, plus a readable LED display that shows the power level of both the case and the buds.
• VOLT PLUS TECH PRO — biggest trade-off: IPX4 is a daily-life water resistance rating, not a swimming rating, and the in-ear fit blocks your ears instead of letting sound in.
• Laoziniu Bone Conduction Headphones — biggest strength: an IPX8 waterproof rating built for pool swimming, plus 32GB of onboard storage so you can leave your phone on the deck.
• Laoziniu Bone Conduction Headphones — biggest trade-off: only about 10 hours per charge, and bone conduction sound trades bass depth for open-ear awareness.
• Who each pick is for: VOLT PLUS TECH PRO for commuters, call-heavy users and anyone who wants long battery life with noise reduction; Laoziniu for swimmers, runners and cyclists who need to hear traffic and water alike.
The VOLT PLUS TECH PRO is built around one idea: never run out of power at a bad time. The included Power ReCharge Case holds a 2,000 mAh battery and is rated for up to 36 hours of total use, with the earbuds themselves streaming for roughly 6–8 hours per charge before you drop them back in the case. The case also has an LED screen that shows the accurate power level of both the box and the earbuds, so you can plan ahead instead of guessing. In my opinion, that display is the most underrated feature here — most budget earbuds make you interpret a blinking light; this one just tells you a number.
On the audio and call side, the specs point to a Bluetooth 5.3 chip with CVC 8.0 noise reduction, a dynamic driver measuring 26 mm, 103 dB sensitivity and 25.94 ohm impedance. The latency figure is listed at 9 milliseconds, which matters if you're watching video and don't want lip-sync lag. There are quad microphones and touch controls, including one-touch track switching and volume adjustment, plus the ability to run either bud solo or both together. The earbuds ship with two sizes of tips, a USB charging cable and a manual, and the enclosure mixes aluminum, high-strength plastic and metal in a white finish with a black case.
Water resistance is where you need to be honest with yourself. The IPX4 rating covers rain, gym sweat and splashes — that's it. It is not a swimming rating, and the in-ear design means you're sealing off the outside world rather than staying aware of it. Buy it if you want long battery life, a visible power readout, noise reduction for calls, and you'll mostly use it commuting, working out indoors or outdoors in light weather. Skip it if you swim laps, need to hear traffic while cycling, or you specifically want nothing inside your ear canal.
The Laoziniu pair is a different animal entirely. It's a bone conduction design, which means the drivers sit against your cheekbones and send sound through vibration, leaving your ear canals completely open. That's the whole point: you hear your music and the world around you at the same time. For runners, cyclists and anyone training near traffic, that awareness is a safety feature, not a compromise. The build uses a titanium band, weighs about 30 grams, and comes with a storage bag, a magnetic charging cable, two sponge earplugs and an adjustment strap.
The headline spec is IPX8 waterproofing, which is the rating class you want for pool swimming, surfing and heavy sweat. There's one important operational detail in the data: Bluetooth doesn't transmit through water, so when you swim you switch to MP3 mode using the built-in 32GB of memory — enough for roughly 8,000 songs. That's why the memory exists at all. After any water use, you're supposed to dry the magnetic charging contacts completely before plugging in, which is normal for this category and worth respecting if you want the battery to last.
Battery life is rated at up to 10 hours per charge with about 2 hours to recharge, and Bluetooth 5.3 gives you a stable connection up to roughly 33 feet in open space, with a built-in mic for calls. There's no active noise cancellation here — the design is the opposite of isolating. Buy it if you swim, surf, or do sweaty outdoor workouts and want your ears open the whole time. Skip it if you need deep bass, long battery life between charges, or noise reduction on calls in loud places.
• Best for battery life → VOLT PLUS TECH PRO. Up to 36 hours total with the 2,000 mAh case versus 10 hours on a single Laoziniu charge.
• Best for swimming → Laoziniu Bone Conduction Headphones. IPX8 is a genuine submersion rating; IPX4 is splash-and-sweat only.
• Best for phone-free workouts → Laoziniu. The 32GB MP3 player means no phone, no signal, no problem.
• Best for calls and noisy environments → VOLT PLUS TECH PRO. CVC 8.0 noise reduction and quad mics are aimed squarely at voice clarity.
• Best for situational awareness → Laoziniu. Open-ear bone conduction keeps traffic, teammates and pool lanes audible.
• Best for power visibility → VOLT PLUS TECH PRO. The LED display shows the real charge level of both the case and the buds.
• Best for all-day commuting and travel → VOLT PLUS TECH PRO. The case works as a portable power bank, so topping up on the move is simple.
• Best for low-latency video → VOLT PLUS TECH PRO. A listed 9 ms audio latency is a spec the Laoziniu sheet doesn't address.
If I had to pick one for most people, I'd buy the VOLT PLUS TECH PRO. In my opinion, the combination of up to 36 hours of total battery, a case that doubles as a power bank, a readable power display and CVC 8.0 noise reduction covers the widest range of everyday situations — commuting, calls, gym sessions and travel. It's the more versatile daily driver of the two.
That said, if you swim, the decision is already made for you. IPX4 simply cannot do what IPX8 does, and the Laoziniu's 32GB MP3 mode exists precisely because Bluetooth fails underwater. Swimmers, surfers and open-road cyclists should pick the Laoziniu and not look back.
can i wear waterproof headphones in the shower
It depends on the rating. IPX4, which is what the VOLT PLUS TECH PRO carries, handles splashes, rain and sweat but isn't intended for direct water exposure like a shower. The Laoziniu pair is rated IPX8, which covers submersion, so it's the more suitable of the two if you actually want water contact.
are headphones waterproof
Not all of them — water resistance is graded. IPX4 means splash-resistant, while IPX8 means the device can handle being submerged. The VOLT PLUS TECH PRO is IPX4 (daily-life protection), and the Laoziniu Bone Conduction Headphones are IPX8 (swimming-capable). Always match the rating to how wet you plan to get.
do bone conduction headphones work underwater
The Laoziniu sheet answers this directly: Bluetooth does not transmit through water, so you switch to the built-in 32GB MP3 mode when swimming. That's exactly why the onboard memory is there. Dry the magnetic charging contacts completely before recharging after any water use.
which one is better for running and cycling
For pure awareness, I'd lean Laoziniu — the open-ear design keeps traffic and surroundings audible, and the 30-gram titanium band is built for movement. For longer sessions where battery and call clarity matter more than ambient sound, the VOLT PLUS TECH PRO's up to 36-hour total runtime is the stronger fit.
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