We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-29 · 6 min read · Independent comparison
If you want a pair of earbuds that doubles as a phone stand and charges without cables, choose CNBRO Magnetic; if you need open-ear headphones that keep you aware of traffic and your surroundings while you run or ride, choose Acjohtin Open Ear Headphones. These two solve completely different problems, and both carry an IPX6 waterproof rating — so the real question is how you plan to wear them.
• CNBRO Magnetic — biggest strength: a magnetic ecosystem that snaps the case to your phone, turns it into a stand, and lets the case top up from your phone's reverse charging. True in-ear isolation with deep bass and 30+ hours total via the case.
• CNBRO Magnetic — biggest trade-off: it's an in-ear design, so you're sealed off from the world, and the Bluetooth version is older at 5.0.
• Acjohtin Open Ear Headphones — biggest strength: an open-ear shape that leaves your ear canal free, so you hear traffic and conversation while you train — plus a newer Bluetooth 6.1 spec and app-based controls.
• Acjohtin Open Ear Headphones — biggest trade-off: with no noise control and a 50Hz–5kHz frequency range, you won't get deep, thumping bass, and the battery figure is modest at 16 hours.
• Who each pick is for: CNBRO Magnetic for commuters, desk workers, and anyone who wants immersive sound and smart charging; Acjohtin for runners, cyclists, and outdoor athletes who prioritize safety and awareness.
The CNBRO Magnetic (model S680) is built around an idea most earbuds don't bother with: the case isn't just a case. It's a magnetic accessory that snaps onto the back of your iPhone or Android phone, holds itself there to prevent loss, and doubles as a phone stand for hands-free viewing. That's a genuinely useful trick if you watch video on your phone at a desk, on a plane tray table, or anywhere you'd otherwise prop the phone against a coffee cup.
Charging is the other headline. The case itself powers up on any wireless pad, so you can drop it on a charger without hunting for a cable. More interesting is the phone-to-case magnetic charging — the case can pull power from your phone's reverse charging feature. That's an emergency top-up, not a daily routine, but it's the kind of thing that saves you when your buds die and there's no outlet in sight. Playback is rated at 6+ hours per charge and 30+ hours with the case, and because the buds refuel while stored, you rarely think about charging at all.
Sound and fit lean toward isolation. This is a true in-ear design with noise isolation, a dynamic setup tuned for deep bass, and Bluetooth 5.0 for the connection. That combination suits commuting, workouts, and focused work sessions where you actually want the outside world turned down. The enclosure is plastic in blue, it weighs about 18 grams, and it's listed for ages 8 and up — so it's a reasonable pick for a kid's first real pair too.
Acjohtin Open Ear Headphones: Who It's For
The Acjohtin Open Ear Headphones (model WS17) take the opposite approach. Nothing goes inside your ear canal. The open-ear shape rests outside it, so ambient sound comes through while your music plays — which is exactly what you want when you're running on a street, riding a bike, or working out in a busy gym where you still need to hear what's happening around you.
The spec sheet reads like it was written for athletes. Bluetooth 6.1 is the newest version here, with a stated range of about 10 meters, so you can leave your phone on a bench and move around. Controls run through an app rather than physical buttons, which keeps the hardware clean and lets you adjust without fumbling. The housing mixes metal and plastic in black and orange, and a protective case is included — a practical touch for something that lives in a gym bag.
Two specs deserve honest attention. First, noise control is listed as none, which is the whole point of open-ear design but also means loud environments will compete with your audio. Second, the frequency range is 50Hz to 5kHz. That's a narrow band, and it tells you the tuning favors speech and midrange clarity over bass — good news for podcasts, calls, and clear-call performance, less so if you want chest-thumping low end.
Battery life is listed at 16 hours, with a 16-hour charge time. That's a long single-charge runtime for an open-ear set, but it also means you'll want to plug in on a schedule rather than treat it as always-ready. It's listed for adults, and there's no headphone jack — wireless only.
Who should skip it? If you want deep bass and total immersion, or if you need earbuds sealed against a noisy commute, the open-ear design and narrow frequency range will frustrate you.
Side-by-Side: Which Should You Choose?
• Best for immersive, bass-forward listening → CNBRO Magnetic. In-ear isolation plus deep-bass tuning is the opposite philosophy, and it's the right one for commuting and focus work.
• Best for charging convenience → CNBRO Magnetic. Wireless-pad charging, magnetic phone attachment, and phone-to-case reverse charging are features nothing on the Acjohtin side offers.
• Best for total playtime → CNBRO Magnetic. 6+ hours per charge stretched to 30+ hours with the case beats the 16-hour figure on the Acjohtin set.
• Best for the newest Bluetooth → Acjohtin Open Ear Headphones. Bluetooth 6.1 versus 5.0 is a real generational gap in the spec sheets.
• Best for hands-free video and calls at a desk → CNBRO Magnetic. The case-stand trick is genuinely handy and has no equivalent here.
• Best for runners, cyclists, and outdoor workouts → Acjohtin Open Ear Headphones. Open ear, app control, and a protective case are built for movement.
• Best for a younger listener → CNBRO Magnetic. It's listed for ages 8 and up; the Acjohtin set is listed for adults.
If I were buying for myself and my priority was everyday sound, smart charging, and not thinking about cables, I'd take the CNBRO Magnetic. The magnetic case, the phone-stand function, and the phone-to-case top-up are the kind of features that change how you actually use earbuds day to day, and 30+ hours with the case means charging becomes a background task. I'd choose the Acjohtin Open Ear Headphones instead if my priority were training outdoors and staying aware of my surroundings — that's a need no amount of bass can fix. Check the current price on Amazon before you decide, since that's the one variable I can't weigh for you.
Yes. Both the CNBRO Magnetic and the Acjohtin Open Ear Headphones carry an IPX6 rating, which covers sweat and heavy splashes. Neither is rated for swimming or submersion, so keep them out of the pool.
The Acjohtin Open Ear Headphones, in my opinion. The open-ear design leaves your ear canal free so you hear traffic, and the app-based controls and included protective case suit outdoor training better than a sealed in-ear set.
The charging case supports phone-to-case magnetic charging using your smartphone's reverse charging feature, alongside standard wireless-pad charging. Treat it as an emergency top-up rather than your main charging method.
They're tuned for different jobs. The CNBRO Magnetic aims for deep bass and isolation, while the Acjohtin set uses a 50Hz–5kHz range that favors clear speech and calls over low-end punch. Pick based on whether you want immersion or awareness.
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