We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-04 · 7 min read · Independent comparison
If you want all-day music with a secure sport fit, choose Poounur Earbuds; if you need to replace a lost or damaged charging cord for RR SPORTS AC889 bone conduction headphones, choose WUNIAK Charging Cable. These two products have almost nothing in common, and that's exactly why this comparison matters. One is a complete wireless audio system you wear while you run. The other is a small accessory that keeps a completely different pair of headphones alive.
• Poounur Earbuds — biggest strength: a full Bluetooth 5.3 audio package with earhooks, a 50-hour charging case and IP7 waterproofing, built for workouts and everyday listening.
• Poounur Earbuds — biggest trade-off: call time drops to roughly 3–4 hours per charge, well below the 8–10 hours you get for music, so heavy talkers will recharge more often.
• WUNIAK Charging Cable — biggest strength: a two-pack of 60 cm magnetic USB cables with a built-in voltage regulator (PTC) to guard against overcurrent damage.
• WUNIAK Charging Cable — biggest trade-off: it's a single-purpose accessory that only fits RR SPORTS AC889 bone conduction headphones — it does not charge phones, tablets or generic earbuds.
• Who each pick is for: Poounur Earbuds for anyone who wants wireless sound for running, gym sessions and commutes; WUNIAK Charging Cable for an existing RR SPORTS AC889 owner who needs a working charger.
The Poounur H9 is a true wireless earbud built around movement. The headline design choice is the flexible silicone earhook — instead of relying on a tip jammed into your ear canal to stay put, the hook wraps around the outer ear for a secure fit. That matters during sprints, burpees or a windy bike ride where ordinary in-ear buds tend to work loose. You also get three sizes of silicone ear tips (S, M, L), so you can dial in the seal rather than settling for whatever fits out of the box.
Battery is the other big story. The buds themselves are rated for 8–10 hours of music, and the charging case pushes total playtime to 50 hours. A dual LED display on the case shows real-time battery status, which is genuinely handy — no guessing whether you have enough juice for the gym. The case recharges over USB-C in about 2 hours. One caveat worth flagging honestly: if you use the buds mainly for calls, runtime falls to roughly 3–4 hours, so the 50-hour figure reflects music listening with top-ups from the case.
On sound and durability, the spec sheet lists a 13mm dynamic driver inside the earbuds (note the product information section also lists a 10mm audio driver size — the marketing copy and the spec table disagree, so treat the exact figure with a little caution). Either way, the tuning is aimed at punchy bass and a full midrange, with ENC noise cancelling to clean up your voice on calls. Bluetooth 5.3 handles the connection, and IP7 waterproofing means sweat and rain are not a problem. Poounur does note that you should wipe the metal charging contacts dry after exercise to avoid sweat corrosion — a small habit that extends the life of any sport earbud.
Buy it if: you want one pair of earbuds for running, workouts, commuting and casual listening, and you value long music runtime and a fit that won't pop out. Skip it if: you mostly take calls all day (the 3–4 hour call figure will frustrate you), or you prefer a wired connection — these are wireless-only, with no headphone jack.
The WUNIAK cable is not a headphone. It's a replacement charging cord, and it's honest about that. It's a magnetic USB cable designed specifically for the RR SPORTS AC889 bone conduction swimming headphones. If you've lost the original charger or the one you have has frayed and stopped working, this is the practical fix — and because it comes as a two-pack, you can keep one at home and stash the other in a bag, car or office drawer.
The design details are simple but sensible. The cable is 60 cm long, which is short enough to coil up and toss in a pocket without turning into a tangled mess. It's black, made with copper wire, and terminates in a USB connector on one end and the magnetic headphone connection on the other (male-to-male, four pins). WUNIAK lists a voltage regulator (PTC) inside the cable, which is meant to prevent overcurrent from damaging your headphones — a genuinely useful safeguard if you're plugging into a variety of USB power sources like a laptop, a wall adapter or a power bank.
That's the whole product, and that's fine. It's not trying to be anything more. The trade-offs are clear: it only fits the RR SPORTS AC889, so it's useless if you own different headphones, and it's purely a charging cable with no data function worth relying on for anything else. WUNIAK also mentions 24/7 email support, which is the kind of thing that matters more for a niche accessory than for a mass-market one — if the fit or the connection is wrong, you want a way to ask.
Side-by-Side: Which Should You Choose?
• Best for listening to music → Poounur Earbuds. It's the only one of the two that actually plays audio.
• Best for long battery life → Poounur Earbuds. Up to 50 hours total with the case, versus a cable that holds no charge of its own.
• Best for workouts and sweat → Poounur Earbuds. IP7 waterproofing plus secure earhooks are built for exactly this.
• Best for replacing a lost charger → WUNIAK Charging Cable. That's its entire purpose, and you get two of them.
• Best for travel convenience → WUNIAK Charging Cable. At 60 cm it slips into any pocket or bag; the Poounur case is bulkier at roughly 6.5 × 5 × 2.8 cm.
• Best for protecting your gear → WUNIAK Charging Cable. The built-in PTC voltage regulator guards against overcurrent.
• Best for phone calls → neither, honestly. Poounur handles calls but drops to about 3–4 hours per charge; the WUNIAK cable does not make calls at all.
• Best for someone with no specific headphone model in mind → Poounur Earbuds. It works with Android 4.4 / iOS 8.0 and above via Bluetooth; the WUNIAK cable only fits one headphone.
If I had to pick one, I'd buy the Poounur Earbuds. They're the product that does something on their own — music, calls, workouts, waterproofing, a 50-hour case — and they don't depend on owning a specific other device. The WUNIAK cable is a good, focused solution, but only if you already own RR SPORTS AC889 headphones and need to charge them. For everyone else, it's a cable for a headphone you don't have. So: Poounur for the audio, WUNIAK for the repair. Buy the one that matches what's actually sitting in your drawer.
FAQ
No. The WUNIAK cable is a magnetic USB charger made specifically for RR SPORTS AC889 bone conduction headphones. Poounur earbuds charge through their own USB-C case, so the WUNIAK cable won't work with them.
WUNIAK states the cable includes a voltage regulator (PTC) to prevent overcurrent damage from USB power sources. That's a meaningful safeguard, but it only applies to the RR SPORTS AC889 it's designed to charge.
Poounur Earbuds. The earhook design, IP7 waterproofing and long music runtime are all aimed at exactly that. The WUNIAK cable produces no sound at all — it only charges a different pair of headphones.
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