How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want secure, sport-ready Lightning earbuds with full in-line control for an iPhone 11–14, choose Avantree L171; if you need a pair of kid-friendly, foldable 3.5mm on-ear headphones that work with school Chromebooks and laptops, choose UKELALA U2.
• Avantree L171 — biggest strength: an earhook design with three sizes of eartips plus physical in-line buttons, so it stays put while you run and you never have to touch your phone.
• Avantree L171 — biggest trade-off: it only works with Lightning iPhones (11 through 14). If you have an iPhone 15 or any USB-C device, it's a non-starter. There's also no active noise cancellation.
• UKELALA U2 — biggest strength: you get two pairs in one box (orange and green), an over-ear fit built for long wear, and a foldable, tangle-resistant 3.5mm design aimed at kids over five.
• UKELALA U2 — biggest trade-off: it's a 3.5mm headphone, so it won't plug into any modern iPhone without an adapter, and the on-ear build is bulkier than an earbud for workouts.
• Who each pick is for: the L171 is for the runner or commuter who lives on an iPhone 11–14; the U2 is for a parent equipping one or two kids for school, travel and shared devices.
The L171 is a Lightning earbud built around one clear idea: stay in your ears and keep control in your hand. Instead of a plain bud, it uses an earhook with a rounded tip that loops over the ear, and Avantree includes three sets of differently sized eartips so you can dial in the fit. In my reading of the spec sheet, that combination is what makes it a sensible pick for running, gym work and any activity where a normal earbud tends to work its way loose.
The other half of the story is the in-line remote. The physical buttons let you play and pause, change volume, skip and replay tracks, take or reject calls, and fire up your voice assistant — all without pulling the phone out of your pocket. There's a built-in microphone for calls, and the dynamic driver covers a 20 Hz to 20,000 Hz range with a 32-ohm impedance, which is a standard, easy-to-drive load for a phone's Lightning port. Sound is described as crisp and well-balanced for music, calls and video. Note that it's sound isolation, not active noise cancellation, so it softens the world around you rather than silencing it.
Buy it if you own an iPhone 11, 12, 13 or 14 and want a wired pair that won't fall out mid-run and gives you buttons instead of taps. Skip it if you've moved to an iPhone 15 or any USB-C phone — the connector simply won't match — or if you want true noise cancellation. One practical detail from the sheet: it only outputs audio when fully seated in the Lightning port, so you should hear a click when it's in. If you ever see an "accessory not supported" message, Avantree's guidance is to reseat the plug firmly or clean dust out of the port. Worth knowing before you blame the earbuds.
The U2 is a different animal entirely, and it's honest about that. This is a two-pack of wired on-ear headphones — one orange, one green — aimed at kids over five. The over-ear cups use ultra-soft earmuffs and are pitched for breathability and long wear, which matters when a child is wearing them through a school day or a long car ride. It's sound isolation rather than active noise cancellation, so it takes the edge off a noisy classroom or back seat without blocking a parent's voice.
The cable is a 1.5 m (about 4.9 ft) nylon-braided cord that the sheet says resists tangling and kinking. The 3.5mm jack is the key spec here: it plugs into Chromebooks, laptops, tablets and phones with a headphone port, which is exactly the mix of devices you find in schools. And the whole thing folds, so it can disappear into a backpack pocket between classes or trips. The build mixes plastic with stainless steel, and the dynamic driver covers the same 20 Hz–20,000 Hz range as the Avantree.
Buy it if you're outfitting one or two children for school, homework or travel and want a durable, packable pair that works with whatever 3.5mm device is on the table. Skip it if you want to plug directly into a modern iPhone with no adapter, or if you're shopping for an adult who wants a compact fitness earbud. It's also not the pick for anyone chasing premium audio — this is a practical, kid-first design, not a hi-fi one.
Side-by-Side: Which Should You Choose?
• Best for iPhone 11–14 owners → Avantree L171. Native Lightning connection, no adapter needed.
• Best for running and sports → Avantree L171. The earhook plus three eartip sizes is designed to stay put during movement.
• Best for households with two kids → UKELALA U2. You get two headphones in the box, one orange and one green, so siblings aren't fighting over a single pair.
• Best for hands-free control → Avantree L171. Volume, track skipping, calls and voice assistant all sit on the in-line remote.
• Best for travel and packing → UKELALA U2. The foldable on-ear design collapses down; earbuds don't fold.
• Best for long-wear comfort over ear cups → UKELALA U2. Over-ear earmuffs are built for extended sessions rather than short bursts.
• Best for a USB-C phone → neither. The Avantree needs Lightning and the UKELALA needs 3.5mm, so check your port before buying either.
If I had to pick one based purely on how specific and well-matched the design is to its job, I'd buy the Avantree L171 for myself — provided I was on an iPhone 11–14. The earhook, the swappable eartips and the full in-line control set add up to a wired earbud that solves the two real annoyances of wired listening: buds falling out and constantly reaching for your phone. If I were buying for a child instead, I'd flip straight to the UKELALA U2, because two foldable 3.5mm pairs that survive a school bag are exactly what that job calls for. Different buyers, different answers — match the port first, then the job. Check the current price on Amazon before you commit, since that's the one thing that can shift the math.
If you run or train with an iPhone 11–14, yes — in my opinion. The earhook, three eartip sizes and in-line volume and track controls are the features a plain bud doesn't give you.
Yes. It's a standard 3.5mm wired headphone, so it works with Chromebooks, laptops, tablets and phones that have a headphone jack. It won't plug into a Lightning or USB-C phone without an adapter.
No. The L171 uses a Lightning connector and is listed as compatible with iPhone 11, 12, 13 and 14 only. iPhone 15 and newer moved to USB-C, so you'd need a different headphone entirely.
Both use a dynamic driver with a 20 Hz–20,000 Hz frequency range, so neither is spec'd as the louder or more premium option. The Avantree is tuned for crisp, balanced everyday listening; the UKELALA is built for kid-friendly comfort and durability. Neither includes active noise cancellation — both rely on sound isolation.
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.