How We Research
Updated: 2026-10-05 · 7 min read · Independent comparison
If you want to keep using your favorite wired headphones with a phone, tablet, car stereo or office desk setup, choose MIPEACE Adapter; if you need a simple cable that turns a USB-C port back into a 3.5mm aux jack, choose Seulliya USB C. Those are two different jobs, and mixing them up is the single most common mistake I see when people go shopping for aux wired headphones. One is a Bluetooth receiver that adds wireless freedom to a wired pair. The other is a passive-feeling dongle that restores the headphone jack your phone took away. For office use, that distinction matters more than anything else on the spec sheet.
• MIPEACE Adapter — biggest strength: it turns any non-Bluetooth headphones, speaker or car stereo into a wireless device over Bluetooth 5.3, with a built-in mic and push-button controls so you never touch your phone.
• MIPEACE Adapter — biggest trade-off: it is only a receiver, not a transmitter, and the 3.5mm cable you need to connect your headphones is not included, so you must already own one.
• Seulliya USB C — biggest strength: a plug-and-play USB-C to 3.5mm aux cord with an advanced DAC chip supporting up to 24bit/96kHz, and it ships as a 2-pack.
• Seulliya USB C — biggest trade-off: it is a physical cable, so your headphones stay tethered, and its usefulness depends entirely on having a USB-C device and a 3.5mm jack at the other end.
• Choose MIPEACE Adapter if you want to cut the cord on wired headphones you already love, or add hands-free calling at a desk or in a car.
• Choose Seulliya USB C if you just need to plug standard 3.5mm aux wired headphones into a modern USB-C phone, tablet or laptop.
The MIPEACE Adapter is a small Bluetooth receiver, model MI-11, in black. Its whole purpose is to sit between your phone and a wired device: you plug it into non-Bluetooth headphones, a speaker or a car stereo using a 3.5mm aux cable, pair it to your phone, and suddenly that wired gear is wireless. It runs Bluetooth 5.3 with a stated range of about 33 feet (10 meters), which is plenty for walking around a room or leaving your phone on a charger across the office.
What makes it genuinely useful for office work is the control layer. There is a built-in microphone, so you can answer, hang up or reject calls without picking up your phone, and a push-button control for volume, play/pause and track skipping. Triple-press the multifunction button and it fires up your voice assistant. That combination is exactly what people are hunting for when they search for anc on ear headphones for office or best in ear headphones for office — except here you get the hands-free part without buying new headphones at all. It charges over USB-C and the battery is rated at 0.44 watt-hours, with the battery itself weighing just 2.9 grams, so the unit is genuinely palm-sized and easy to toss in a bag.
Who should skip it? Anyone who thinks this will make a wired-only device transmit audio out. It will not. MIPEACE is explicit that this is only a receiver, not a transmitter, so it cannot send audio from a TV or an old MP3 player to Bluetooth earbuds. And because the 3.5mm cable is not in the box, budget for the fact that you need one already. If you want zero cables and zero pairing, this is the wrong product — the Seulliya cable is the simpler answer.
The Seulliya USB C to 3.5mm Audio Aux Jack Cable is the modern replacement for the headphone jack. One end is USB-C, the other is a standard 3.5mm aux plug, and it measures 39.6 inches, which is long enough to reach from a phone in your pocket to headphones on your head, or from a laptop on a desk to a speaker across it. It comes as a 2-pack, which is genuinely handy if you want one in your bag and one permanently at your workstation.
The technical story here is the DAC chip. Because USB-C carries a digital signal, something has to convert it back to analog for your wired headphones, and Seulliya uses an advanced DAC supporting up to 24bit/96kHz output. In plain terms, that is high-fidelity stereo audio rather than a muffled compromise. The company also states the cable has completed MFi certification requirements and uses an original terminal with a smart chip, so you should not get the "this accessory is not supported" warning that plagues cheap dongles. That last point is the real reason to pick this over a no-name cable.
Side-by-Side: Which Should You Choose?
• Best for making wired headphones wireless → MIPEACE Adapter. It converts any 3.5mm device into a Bluetooth one over Bluetooth 5.3.
• Best for restoring a missing headphone jack → Seulliya USB C. It is the direct USB-C to 3.5mm bridge, no pairing required.
• Best for hands-free calls → MIPEACE Adapter. The built-in mic plus push-button call control is the whole point of the design.
• Best for audio quality ceiling → Seulliya USB C. Its DAC supports up to 24bit/96kHz, which is the higher-fidelity path of the two.
• Best for range and movement → MIPEACE Adapter. Up to 33 feet of Bluetooth freedom beats a 39.6-inch cable every time.
• Best for a fixed desk or car setup → Seulliya USB C. Plug it in, leave it there, and it just works with zero charging.
• Best for charging hassle → Seulliya USB C. It needs no battery at all; MIPEACE Adapter recharges over USB-C.
• Best for value in the box → Seulliya USB C. It ships as a 2-pack, while MIPEACE Adapter does not include the 3.5mm cable.
In my opinion, if you are setting up for office work and you already own good aux wired headphones, the MIPEACE Adapter is the more interesting buy — the built-in mic, hands-free call control and 33-foot Bluetooth range solve the exact problem that sends people shopping for anc on ear headphones for office in the first place, and you keep the headphones you already like. But if your only real problem is that your USB-C phone or laptop has no headphone jack, buy the Seulliya USB C cable instead. It is simpler, needs no charging, and its 24bit/96kHz DAC is the cleaner audio path. Check the current price on Amazon before you commit — both are inexpensive enough that owning one of each is a reasonable move.
You have two routes. The Seulliya USB C cable plugs straight into a USB-C port and gives you a 3.5mm aux jack on the other end, converting the digital signal with its DAC chip. The MIPEACE Adapter does it wirelessly instead, pairing to your phone over Bluetooth 5.3 and connecting to your headphones with a 3.5mm cable you supply.
If your phone is USB-C, the Seulliya cable is plug and play — no software or drivers needed, and it supports iPhone 15/16 series, Samsung Galaxy S23 and S22 families, Pixel and iPad among others. If you would rather go cordless, plug the MIPEACE Adapter into your headphones, pair it to your phone, and select the "Mipeace" ID when it appears.
The MIPEACE Adapter turns any non-Bluetooth headphones into a wireless pair, but it needs a 3.5mm aux cable to do it — and that cable is not included in the box, so you will need one on hand. The Seulliya cable takes the opposite approach: it permanently converts a USB-C port into a 3.5mm aux output, so your existing aux wired headphones plug right in.
Yes, if the stereo has a 3.5mm aux input. Connect the adapter with a 3.5mm cable, pair your phone, and it becomes a Bluetooth receiver for that system. Just remember it is a receiver only, not a transmitter, so it cannot send audio out to Bluetooth speakers or earbuds.
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