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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
• Seulliya Apple MFi Certified — biggest strength: a genuine MFi-certified Lightning-to-3.5mm adapter with a 32-bit RISC-V DAC (125MHz, 95dB SNR, up to 48kHz) that turns any old 3.5mm headphone, car aux port or speaker into a working iPhone audio setup.
• Seulliya Apple MFi Certified — biggest trade-off: it is a listening-only adapter. The data sheet states plainly that it does not support call or mic functions, so you cannot take calls through it.
• ASKUBSKU Open Ear Headphone — biggest strength: a wired USB-C earphone with an inline mic and button controls, plus a hook-style open-ear design that keeps you aware of your surroundings.
• ASKUBSKU Open Ear Headphone — biggest trade-off: it is a USB-C-only product, so it will not work with older Lightning iPhones at all, and its open design means very little passive isolation for loud environments.
• For whom: Seulliya for Lightning-port iPhone and iPad owners who want to keep their existing wired gear alive. ASKUBSKU for USB-C iPhone, iPad, Samsung, Pixel and MacBook users who want a mic-equipped earphone for running and the gym.
This is a small, single-purpose product, and it is honest about what it does. The Seulliya adapter plugs into a Lightning port and gives you back a 3.5mm jack. That is it. The reason it is worth a look rather than a random cheap dongle is the certification and the chip inside: the data sheet lists a genuine Apple MFi certified chipset, verifiable on Apple's official MFi site, and a 32-bit RISC-V DAC running at 125MHz with a 95dB signal-to-noise ratio and support for sampling rates up to 48kHz. In plain terms, that is a proper audio conversion stage rather than the bare-minimum parts used in the cheapest adapters. If you have ever had an iPhone throw a compatibility pop-up at a cheap dongle, the certification is exactly the thing that is supposed to prevent that.
Who should skip it? Two groups. First, anyone who needs to make or take calls through their headphones — the data sheet explicitly says call and mic functions are not supported, so this is a music, podcast and audiobook tool only. Second, anyone on a USB-C iPhone. This is a Lightning product, full stop; an iPhone 15 or 16 needs a different solution entirely. There is also no plug or battery involved, which means nothing to charge, but also nothing to power an active noise-cancelling headphone beyond what the phone provides.
ASKUBSKU Open Ear Headphone: Who It's For
The ASKUBSKU is a completely different animal: a wired USB-C earphone built around a hook-style, open-ear design. Instead of sealing into your ear canal, the earpiece rests outside it and hooks over your ear. The data sheet calls out the payoff directly — a non-in-ear fit for long wear without ear fatigue, and an open design that keeps you aware of your surroundings while audio plays. If you have ever taken a call or finished a long run with that plugged-up, pressurized feeling in your ears, that is the problem this shape solves.
The second thing that separates it from the Seulliya is the inline control pod. Button controls let you adjust volume, skip tracks and answer calls without pulling your phone out. Combined with the built-in mic, that makes it a genuine two-way audio device. It also ships with a protective case, which is a small thing but a practical one for a gym bag. The 16 ohm impedance figure is low, which generally means it does not demand much from a phone's output to reach a usable volume. Enclosure is plastic, colour is white, and the model is ASKUBSKU-0226.
Side-by-Side: Which Should You Choose?
• Best for keeping existing wired headphones alive → Seulliya Apple MFi Certified. It exists purely to convert Lightning to 3.5mm.
• Best for calls and voice → ASKUBSKU Open Ear Headphone. It has a built-in mic and inline button controls; the Seulliya explicitly does not support calls.
• Best for running, gym and outdoor awareness → ASKUBSKU Open Ear Headphone. Hook fit plus open-ear design, described as staying put during intense activity.
• Best for long listening sessions without ear fatigue → ASKUBSKU Open Ear Headphone. The non-in-ear fit is the whole point of the design.
• Best for older iPhones and iPads → Seulliya Apple MFi Certified. Its compatibility runs from iPhone 14 back to iPhone 7 and covers a long list of older iPads.
• Best for newer iPhones, Samsung, Pixel and MacBook → ASKUBSKU Open Ear Headphone. USB-C across the board.
• Best for in-car aux and desk speakers → Seulliya Apple MFi Certified. Any 3.5mm device works the moment you plug in.
• Best for commuting in noise → neither, honestly. The Seulliya passes through whatever your headphones do; the ASKUBSKU is deliberately open. If isolation is your priority, look elsewhere.
In my opinion, the right pick depends entirely on one question: what connector is on your phone? If you are on a Lightning iPhone and you own wired headphones you love, I would buy the Seulliya Apple MFi Certified — the MFi certification and the dedicated DAC are the two things that separate a reliable adapter from a frustrating one, and it costs you nothing in setup effort. If you are on a USB-C iPhone or an Android phone and you want one wired earphone for running, calls and everyday wear, I would buy the ASKUBSKU Open Ear Headphone instead. They are not really competitors; they solve different problems for different phones.
how to use headphones for iphone
It depends on your port. On a Lightning iPhone, plug a 3.5mm headphone into the Seulliya adapter and the adapter into the phone — no app or setup needed, and audio routes automatically. On a USB-C iPhone, a product like the ASKUBSKU plugs straight into the port and plays immediately.
how to use wired headphones for iphone 15
The iPhone 15 uses USB-C, so the Seulliya Lightning adapter will not fit. You want a USB-C earphone like the ASKUBSKU Open Ear Headphone, which the data sheet lists as compatible with iPhone 15, 15 Pro, 15 Pro Max and 15 Plus. Plug it in and use the inline buttons for volume and tracks.
how to use wired headphones for iphone
First identify the port. Lightning models from iPhone 7 through iPhone 14 need an adapter such as the Seulliya, which converts Lightning to a 3.5mm jack so any wired headphone works. USB-C models accept a USB-C earphone directly. In both cases there is nothing to install.
how to use wired headphones for iphone 16
The iPhone 16 family is USB-C, so a Lightning adapter is the wrong tool. The ASKUBSKU is listed as compatible with iPhone 16, 16 Plus, 16 Pro and 16 Pro Max — plug the USB-C connector in, and the inline mic and buttons handle calls and playback. If you would rather keep a 3.5mm headphone, you will need a USB-C-to-3.5mm adapter instead.
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