We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-23 · 7 min read · Independent comparison
If you want one adapter that keeps a wired headphone plugged in while your phone fast-charges over USB-C, choose phoie USB-C; if you need to switch a single pair of speakers or headphones between two audio sources without yanking cables, choose WLTASUY 3.5mm.
• phoie USB-C — biggest strength: a true 2-in-1 dongle that carries both a 3.5mm aux jack and up to 60W USB-C charging, with 384kHz hi-res audio decoding and a 3-year limited warranty.
• phoie USB-C — biggest trade-off: it only makes sense if your device has a USB-C port (or is an iPhone 15/16/17-class model); on older Lightning iPhones it simply won't fit.
• WLTASUY 3.5mm — biggest strength: a passive, plug-and-play bidirectional switcher that lets you flip between two sources or two outputs with one button press, no power supply needed.
• WLTASUY 3.5mm — biggest trade-off: it doesn't charge anything and doesn't improve audio — it's purely a routing box, and its warranty is short at 90 days.
• Who each pick is for: phoie USB-C is for the phone owner who wants charging and wired listening at the same time; WLTASUY 3.5mm is for the desk or living-room setup with one headphone and two devices (or the reverse).
The phoie USB-C adapter solves one specific, very modern annoyance: the phone in your pocket has no headphone jack, and you'd rather not choose between listening and charging. It's a single small dongle — 4.3 x 0.8 x 0.3 inches and just over seven grams — with two ports on it: one USB-C pass-through for charging and one 3.5mm aux output for wired headphones or earbuds. That two-port layout is the whole point. Plug the dongle into your phone, plug your headphones into the dongle, plug your charging cable into the dongle, and both jobs run at once.
The audio side is where it separates itself from a generic splitter. phoie rates it for 384kHz hi-res audio, which is a far higher sample-rate ceiling than the CD-quality 44.1kHz most people stream. In practice that spec matters most if you're feeding a decent wired headphone or IEM with lossless or high-resolution files — the adapter isn't the bottleneck in that chain. Charging is rated up to 60W over USB-C, which is enough headroom to fast-charge a modern phone rather than just trickle it. The shell is white ABS, so it's light and pocketable, and phoie backs it with a 3-year limited warranty — a notably long coverage window for an accessory this small.
WLTASUY 3.5mm: Who It's For
The WLTASUY 3.5mm is a completely different animal — it's not an adapter for your phone, it's a small switch box for your audio gear. It's bidirectional, which is the feature worth understanding. In one direction (2-in-1 out) you connect two audio sources — say a PC and a phone, or a game console and a laptop — and press the button to send whichever one you want to a single output like a speaker or headphone. In the other direction (1-in-2 out) you take one source and route it to two destinations, flipping between them with the same button. Either way, the win is the same: no more crawling behind the desk to swap cables.
It's fully passive. There's no power supply and no plug-in-and-hope — it's plug and play, so it works whether or not there's a free outlet nearby. The box itself is compact at 2.6 x 2.5 x 1.1 inches with a solid aluminium shell, which reads as sturdier than a plastic puck and is small enough to sit unobtrusively next to a monitor or amp. WLTASUY includes a 3.3-foot (1-meter) 3.5mm audio cable in the box, so you can set it up without hunting for a spare. Audio output is stereo, and compatibility covers the usual 3.5mm suspects: Android phones, MP3/MP4 players, PCs, laptops, game consoles and Blu-ray players on the input side, and speakers, soundbars and headphones on the output side.
Who should buy it? Anyone with a permanent two-source or two-output setup who's tired of unplugging cables — a home office with a work laptop and a personal PC sharing one speaker set is the classic case. Who should skip it? Anyone expecting it to charge a phone (it won't), anyone whose headphones are USB-C or wireless (it's strictly 3.5mm), and anyone who wants better sound quality — this routes audio, it doesn't process it. Also note the 90-day warranty, which is far shorter than phoie's, so treat it as a simple, low-risk utility rather than a long-term investment.
• Best for charging while listening → phoie USB-C. It's the only one of the two with a charging port, rated up to 60W.
• Best for switching between two devices → WLTASUY 3.5mm. One button, two sources or two outputs, no cable swapping.
• Best for high-resolution audio → phoie USB-C. Its 384kHz rating is aimed at hi-res playback from a phone or tablet.
• Best for a desk or hi-fi setup → WLTASUY 3.5mm. A passive metal box with an included cable suits a stationary rig far better than a pocket dongle.
• Best for travel and pocket carry → phoie USB-C. At roughly 7 grams and 4.3 inches long, it disappears into a bag.
• Best for iPhone 15/16/17, Galaxy or Pixel owners → phoie USB-C. The compatibility list is built around exactly those models.
• Best for mixed brands and older gear → WLTASUY 3.5mm. Anything with a 3.5mm jack can join the party, regardless of make.
• Best for warranty peace of mind → phoie USB-C. A 3-year limited warranty versus 90 days is a meaningful difference in how long you're covered.
If I had to pick one for the most people, I'd buy the phoie USB-C. In my opinion it earns that spot because it fixes the single most common modern audio problem — no headphone jack — while adding charging instead of taking it away, and the 3-year warranty makes it the lower-risk purchase. The WLTASUY 3.5mm is genuinely good at what it does, but it's a specialist tool for a stationary setup with two audio devices. Buy it only if that describes your desk. Otherwise, the phoie is the one I'd reach for.
If you ever charge and listen at the same time, yes. A plain dongle forces you to choose one or the other; phoie's two-port design lets you do both, and it adds a 384kHz hi-res audio rating on top. Check the current price on Amazon to see how it stacks up against basic dongles.
No. It's a passive audio router with no power supply and no charging function — it only moves a stereo 3.5mm signal between inputs and outputs. Don't buy it expecting anything electrical beyond signal routing.
Only if your needs are genuinely different. The phoie lives on your phone and solves charging-plus-listening on the go; the WLTASUY sits on a desk and solves cable-swapping between two devices. Most people need one or the other, not both.
The WLTASUY 3.5mm, clearly. Its whole purpose is switching between two inputs into one output with a button press, and the included 3.3-foot cable covers most desk layouts. The phoie has nothing to do with that job.
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See also: URIZONS 3.5mm vs ELOLOHI USB C, Cubilux USB C vs FiiO Snowsky Wind 3.5mm, TOPAUX 3.5mm vs epekops AI