We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-02 · 6 min read · Independent comparison
If you want to keep listening on wired headphones while your phone tops up at up to 60W, choose Marsno USB C; if you need truly wireless earbuds with a quick-charge top-up and a charging case, choose Jinpei Cute Litte Devils.
• Marsno USB C – biggest strength: a 2-in-1 USB-C splitter that feeds a 3.5mm headphone jack and passes through PD 60W charging at the same time, with a built-in DAC for clean audio.
• Marsno USB C – biggest trade-off: it's a dongle, not headphones. It needs a wired 3.5mm headset, doesn't do data transfer, and skips QC/Samsung Super Fast Charging.
• Jinpei Cute Litte Devils – biggest strength: a cute devil-themed pair of TWS earbuds with Bluetooth 5.0, a 14.2mm driver, and a 5-minute quick charge that returns up to 2 hours of playback.
• Jinpei Cute Litte Devils – biggest trade-off: no wired jack at all, and per-charge runtime is 4–6 hours before you need the case again.
• Pick Marsno USB C if you already own good wired headphones and want to charge while you listen.
• Pick Jinpei Cute Litte Devils if you want cable-free earbuds, especially as a fun gift.
The Marsno USB C is a small black glossy adapter that solves one very specific, very annoying problem: modern phones dropped the 3.5mm jack, but you still want to use your favorite wired headphones. Instead of forcing you to choose between charging and listening, it splits one USB-C port into two — an aux jack for your headphones and a USB-C pass-through for your charging cable. Plug and play, no drivers. The built-in smart DAC chip is the part I care about most, because it's what keeps the audio signal stable and free of the current noise that cheap splitters are known for. It follows the CTIA standard and even supports in-line remote control.
Charging is where it earns its keep. It supports up to 60W Power Delivery through a built-in EJ899M chip that holds voltage and current steady. In my opinion, this is the pick for someone who games or takes long calls on wired headphones and doesn't want the battery dying mid-session. The compatibility list is long and current: iPhone 17 / Air / 17 Pro / 17 Pro Max down through the 15 series, Samsung S25 / S24 / S23 and older, Pixel, iPad Pro, Huawei Mate 60 / P50 / P40 series and more.
Skip it if you're an all-wireless person — this adapter is pointless without a wired 3.5mm headset. Also skip it if you rely on QC charging or Samsung Super Fast Charging, because those aren't supported; a PD wall charger is what you want. Two more honest caveats: data transfer isn't supported, and the microphone on Apple EarPods with a 3.5mm plug won't work through it. If you hear echo on calls, the fix is a higher-quality wired headset, not a different adapter.
The Jinpei Cute Litte Devils are wireless in-ear earbuds built around a fun, gift-friendly devil design. They're clearly aimed at kids and adults who want something playful — the kind of thing that works as a Christmas, Halloween or New Year present. But the spec sheet underneath the cute shell is more serious than the name suggests. Inside sits a 14.2mm dynamic driver with SBC and AAC codec support, tuned for a punchy low end with smooth mids and clean treble. Bluetooth 5.0 handles the connection, and pairing is a one-step affair: pull the buds from the case and they sync automatically, then reconnect to the last device next time.
The charging story is the headline for this comparison. On a single charge you get 4–6 hours of playback, and the compact case holds an additional 3–5 full charges. The detail I keep coming back to is the quick top-up: five minutes in the case returns up to 2 hours of listening. If you've ever grabbed dead earbuds on the way out the door, you understand why that matters.
They weigh just 8g total (4g per bud), use touch controls for play, pause, skip and calls, and ship with three sizes of ear tips so you can find a secure fit for workouts. A built-in mic handles calls, and the noise control is sound isolation — passive sealing, not active cancellation, so don't expect ANC. Skip these if you want wired audio, studio-grade isolation, or a jack; there simply isn't one.
Side-by-Side: Which Should You Choose?
• Best for charging while you listen → Marsno USB C. It's the only one of the two that charges your phone and plays audio through a wired headset simultaneously, at up to PD 60W.
• Best for a fast top-up → Jinpei Cute Litte Devils. Five minutes in the case buys up to 2 hours of playback.
• Best for audio quality with your own headphones → Marsno USB C. The DAC chip and CTIA-standard aux path let a good wired headset do the work.
• Best for wireless freedom and workouts → Jinpei Cute Litte Devils. Bluetooth 5.0, 8g total weight, three ear-tip sizes, touch control.
• Best as a gift → Jinpei Cute Litte Devils. The devil design and holiday framing make it the obvious present of the two.
• Best for iPhone 15–17 and Galaxy S25 owners with wired headphones → Marsno USB C. Those are exactly the devices it lists as compatible.
• Best for low fuss → depends on your gear. No wired headphones? The Jinpei is the only one that makes sense. Great wired headphones and a long day ahead? The Marsno is the one.
If I had to pick one for myself, I'd buy the Marsno USB C — but only because I already own wired headphones I like, and the 60W pass-through means I never have to choose between a charged phone and good sound. It's a tool, not a toy, and it does its one job well. That said, if you want actual earbuds rather than an adapter, the Jinpei Cute Litte Devils win by default: Bluetooth 5.0, a 14.2mm driver, and that five-minute-to-two-hours top-up are genuinely useful. In my opinion, the right answer is decided by one question — do you already have wired headphones you love?
FAQ
how to charge headphones faster
With the Jinpei Cute Litte Devils, drop them in the charging case — a 5-minute top-up gives up to 2 hours of playback. With a wired setup through the Marsno USB C, "faster" depends on your PD wall charger, since the adapter passes up to 60W through and a PD source is recommended.
The Jinpei earbuds charge inside their case, which itself holds 3–5 extra full charges — no cable needed during the day. The Marsno USB C doesn't charge headphones at all; it charges your phone while your wired headphones play through the 3.5mm jack.
is fast charging bad for headphones
The Marsno USB C uses a built-in EJ899M chip to keep voltage and current stable, which is the design intent behind safe fast charging. The Jinpei's quick top-up is built into its own case, so both are engineered for it — just match the right charger, and note the Marsno doesn't support QC or Samsung Super Fast Charging.
how to fast charge bose headphones
Neither product is a Bose charger. If your Bose headphones are wired, the Marsno USB C can pass PD 60W to your phone while the headphones play through the aux jack. If they're wireless, charge them with their own cable — the Jinpei case only charges the Jinpei earbuds.
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