How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want to keep using the wired headphones and car stereos you already own with a Lightning iPhone, choose Seulliya MFi Certified iPhone; if you need a complete pair of USB-C earbuds for a newer iPhone 15, 16 or 17, choose AIFEIMEI 2. These two products solve the same basic problem — wired audio on an iPhone — from opposite directions, and the right pick depends entirely on which iPhone you carry and whether you need a cable or a set of earphones.
• Seulliya MFi Certified iPhone — biggest strength: an Apple MFi Certified Lightning-to-3.5mm adapter cable that turns any existing 3.5mm headphones, car stereo, speaker or Hi-Fi into something your Lightning iPhone can drive, with gold-plated contacts and a 15,000+ bend lifespan.
• Seulliya MFi Certified iPhone — biggest trade-off: it is a cable only. It adds nothing to listen with, and it does not work with USB-C iPhones or iPads, and it will not drive AirPods Max.
• AIFEIMEI 2 — biggest strength: a two-pack of complete USB-C in-ear earbuds with an inline remote, microphone and passive noise cancellation, so you get sound, calls and controls in one box.
• AIFEIMEI 2 — biggest trade-off: it is USB-C only. It will not fit a Lightning iPhone, and it is a self-contained headset, not an adapter for gear you already own.
• Who each pick is for: Seulliya for Lightning-era iPhone owners who want to reuse existing audio gear; AIFEIMEI 2 for USB-C iPhone 15/16/17 owners who want earbuds with a mic right out of the box.
The Seulliya cable is a bridge, not a headset. One end is a Lightning connector, the other is a standard 1/8-inch (3.5mm) male jack, and it runs 3.3 feet. That single design decision is what makes it useful: anything with a 3.5mm socket — your car's AUX-in, a kitchen speaker, a Hi-Fi system, a computer, a portable speaker, or a pair of wired headphones you have owned for years — becomes playable from your iPhone again. There is no driver to install, no external power, no pairing. You plug it in and press play.
Who should buy it: anyone with a Lightning iPhone who wants to keep using a car stereo, a home system or a favourite pair of wired headphones. It is also the sensible pick if you want one small cable in your bag instead of a charging case and a battery to babysit. Who should skip it: if you own an iPhone 15 or newer, this cable will not physically connect — those phones use USB-C. It also will not work with USB-C iPads or iPad Pros, and it cannot drive AirPods Max, which need bidirectional transmission. And if you want earphones included, this is the wrong product entirely.
AIFEIMEI 2: Who It's For
AIFEIMEI 2 goes the other way: instead of adapting your phone to your old gear, it hands you the listening gear itself. This is a two-pack of wired USB-C in-ear headphones, one black and one white, built around a dynamic driver with a rated frequency range of 20Hz to 20,000Hz. That is the standard full-range window for consumer earbuds, and it means the low end should be present without the mids disappearing — the listing describes it as natural clarity with super bass.
Because these are complete earbuds rather than an adapter, the feature list is about the listening experience itself. The in-ear shape is designed to sit securely and resist falling out, the enclosure is silicone, and the noise control is passive — meaning the seal in your ear does the blocking rather than electronics. There is an inline remote with a multi-function button for hands-free calls and playback, and a hidden microphone for conversations, so you do not need to touch the phone. Connectivity is wired USB-C, so there is no battery, no pairing and no charging case.
Compatibility is the part to read carefully. The USB-C plug covers iPhone 17, 16 and 15 in their standard, Plus and Pro Max forms, plus iPad Pro, Galaxy Note 20/Note 10/S21/S20, several Mate and P-series Huawei models, Google Pixel 4 through 2 and most other Type-C devices. Two pairs in the box is genuinely useful if you want one for a desk and one for a bag, or if you tend to lose earbuds.
Who should buy it: USB-C iPhone owners who want a simple wired headset with a mic for calls, commutes, calls at a desk, or as a cheap spare pair. Who should skip it: anyone still on a Lightning iPhone, since the plug will not fit; and anyone who wants to run audio into an existing stereo or speaker system, because this is a headset, not an output cable. There is also no warranty stated on the listing, which is worth knowing before you buy.
• Best for reusing old gear → Seulliya MFi Certified iPhone. It connects your phone to car stereos, speakers, Hi-Fi and any 3.5mm headphones.
• Best for calls and listening out of the box → AIFEIMEI 2. The earbuds, mic and inline remote are all included.
• Best for a Lightning iPhone → Seulliya MFi Certified iPhone. The AIFEIMEI plug is USB-C and will not fit.
• Best for an iPhone 15, 16 or 17 → AIFEIMEI 2. The Seulliya cable is Lightning-only and will not connect.
• Best for audio quality headroom → Seulliya MFi Certified iPhone, on paper: it supports Hi-Res up to 24-bit/96kHz with a certified DAC and gold-plated contacts, though the final sound still depends on the headphones or speakers you plug into it.
• Best for two people or a spare set → AIFEIMEI 2. It ships as a two-pack in black and white.
• Best for durability claims → Seulliya MFi Certified iPhone. The 15,000+ bend lifespan is a stated figure; AIFEIMEI does not publish one.
• Best for travel simplicity → Seulliya MFi Certified iPhone. A 3.3-foot cable takes up less room than a pair of earbuds, especially if you already carry headphones.
In my opinion, the deciding factor here is not sound quality — it is the port on your phone. If you carry a Lightning iPhone and you own headphones, a car stereo or a speaker you like, I would buy the Seulliya MFi Certified iPhone. It is the only one of the two that lets you keep using that gear, and the certified chip plus the Hi-Res support make it the more capable audio link. If you have moved to a USB-C iPhone 15, 16 or 17, I would buy AIFEIMEI 2 instead: the Seulliya cable simply will not plug in, and the two-pack gives you a complete, battery-free headset with a mic and remote. Check the current price on Amazon for whichever one matches your phone before you commit.
how to use headphones for iphone
If your iPhone uses Lightning, plug the Seulliya adapter into the phone and your 3.5mm headphones into the other end — no setup, no driver, no power needed. If your iPhone uses USB-C, such as an iPhone 15, 16 or 17, plug the AIFEIMEI 2 earbuds directly into the port. Both are plug-and-play wired connections.
how to use wired headphones for iphone 15
The iPhone 15 uses USB-C, so a Lightning adapter will not fit. You need either USB-C earbuds like AIFEIMEI 2, or a USB-C-to-3.5mm adapter if you want to keep using existing wired headphones. AIFEIMEI 2's listing confirms compatibility with iPhone 15, 15 Plus and 15 Pro Max.
how to use wired headphones for iphone
Check the port first. Lightning models (iPhone 14 and older) need an MFi Certified Lightning-to-3.5mm cable like the Seulliya, which passes audio through a certified chip to your headphones. USB-C models (iPhone 15 and newer) work with USB-C headphones or a USB-C audio adapter instead.
how to use wired headphones for iphone 16
The iPhone 16 is a USB-C device, so the same rule as the 15 applies: use USB-C earbuds such as AIFEIMEI 2, or a USB-C adapter for 3.5mm headphones. The Seulliya Lightning cable is not compatible with the iPhone 16.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: hafiuege USB C Charger vs Seulliya Apple MFi Certified, Acer OHW328 vs IIOZO Apple MFi Certified: Wired Headphones, Seulliya USB C vs LUDOS OMNITONE USB C: USB C Headphones