We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-04 · 6 min read · Independent comparison
If you want maximum battery life, a lower-latency connection and a charging case that bails you out fast, choose MINISO MS219; if you need an open-ear fit that keeps you aware of your surroundings during long study sessions, choose Oraolo Open Ear AC322. Both are IPX5-rated wireless earbuds, so the real question is how you plan to use them — and for study, the gap between a sealed in-ear hook design and an open-ear design matters more than any spec sheet headline.
• MINISO MS219 — biggest strength: 48 hours of total playtime with the case, plus a 10-minute fast charge that buys 3 hours of listening, and Bluetooth 6.0 with 0.06-second latency.
• MINISO MS219 — biggest trade-off: It's an on-ear hook design with no transparency mode listed, so you're sealed in more than you are with an open-ear bud.
• Oraolo Open Ear AC322 — biggest strength: A true open-ear shape that keeps you aware of your surroundings, with adjustable ear hooks and a 36-hour total runtime.
• Oraolo Open Ear AC322 — biggest trade-off: Bluetooth 5.4 rather than 6.0, no fast-charge claim, and a slightly smaller total battery figure.
• Pick MINISO MS219 if you want the longest runtime, the fastest top-up, and dual-device switching for juggling a laptop and phone.
• Pick Oraolo Open Ear AC322 if you want your ears to stay open to the room — the classic case for study, shared spaces and outdoor walks.
The MS219 is built around stamina and connection quality. On a single charge you get 8 hours, and the charging case pushes that to 48 hours total. That's the kind of number that matters if you're the type who forgets to plug things in — you can go days of studying, commuting and gym sessions without thinking about a cable. And when you do forget, a 10-minute charge gives you 3 hours, which is roughly a full study block plus a walk.
The Bluetooth 6.0 chip is the other headline. It pairs faster, holds a more stable link and uses less power than older versions, and the 0.06-second latency keeps audio and video in sync — useful for lecture recordings, YouTube explainers or anything where lip-sync drift is annoying. It also supports connecting to two devices at once, so you can jump between a laptop and a phone with a single tap instead of repairing every time. The 13mm dynamic drivers are tuned for a full, bass-forward sound with clear vocals, which suits pop, podcasts and audiobooks. Directional sound transmission is claimed to cut leakage, so your audio stays yours in a quiet library.
Fit-wise, each bud is very light, and the memory titanium ear hooks flex to your ear shape with a three-point support system, which is the design language of a bud that stays put during running, yoga or cycling. The trade-off is honest: this is a hook-style on-ear fit with no transparency mode in the spec sheet. If you need to hear a professor, a roommate or traffic around you, the MS219 is not the tool for that. Buy it if you want battery, low latency and dual-device convenience; skip it if ambient awareness is your priority.
The AC322 goes the other way. Its whole reason for existing is the open-ear shape: the driver sits outside your ear canal rather than plugging it, so you keep situational awareness for hours without the pressure and fatigue that sealed buds can cause. For study, that's a genuinely different experience — you can keep a lecture playing at low volume while still hearing a study partner, a timer, or someone calling your name. This is the kind of design that fits the "best open ear earbuds for study" brief almost by definition.
You still get 8 hours from the buds themselves and 36 hours total with the charging case, so a week of moderate use between charges is realistic. The drivers are 12mm dynamic units, and Oraolo describes the tuning as clear and rich rather than bass-heavy. The ear hooks are adjustable, which is a real plus if your ears have never played nicely with one-size hooks — "secure fit" here is customizable rather than fixed. Bluetooth 5.4 handles the connection with a fast, stable link and low latency, and the case supports wireless charging, which is a nice everyday convenience if you already have a charging pad on your desk.
There is no active noise cancellation and no transparency mode listed — because with an open-ear design, you're already hearing the world. That's the point, not a flaw. The IPX5 rating covers sweat and light rain, so runs and workouts are fine. Buy it if comfort, awareness and an adjustable fit matter most; skip it if you want isolation or the longest possible total runtime.
• Best for total battery life → MINISO MS219. 48 hours with the case versus 36 hours on the Oraolo.
• Best for a quick top-up → MINISO MS219. A 10-minute charge yields 3 hours of use; the Oraolo sheet makes no equivalent fast-charge claim.
• Best for study in a shared or noisy-adjacent space → Oraolo Open Ear AC322. The open-ear design keeps you aware of your surroundings, which is the single biggest reason to pick it.
• Best for the longest, most fatigue-free listening sessions → Oraolo Open Ear AC322. Open-ear means no ear canal pressure, and the hooks are adjustable.
• Best for low-latency video and dual-device switching → MINISO MS219. Bluetooth 6.0 with 0.06-second latency and simultaneous two-device connection.
• Best for a bass-forward, sealed-in sound → MINISO MS219. 13mm drivers with directional sound transmission to limit leakage.
• Best for wireless charging convenience → Oraolo Open Ear AC322. The charging case supports wireless charging.
• Best for workouts and rain → a tie. Both carry an IPX5 water-resistance rating, so both handle sweat and light rain.
If I were buying for study, I'd take the Oraolo Open Ear AC322. The reason isn't a spec sheet win — it's the shape. An open-ear bud that lets you hear your surroundings while a lecture or focus playlist plays quietly is the more usable tool for long desk sessions, and the adjustable hooks make the fit more forgiving over hours. If your study happens in a loud café or you simply want the longest runtime and the fastest emergency charge, the MINISO MS219 is the better pick, and its Bluetooth 6.0 and dual-device switching are genuinely useful for a laptop-plus-phone workflow. Neither one is a bad choice — they're just aimed at different ears. Check the current price on Amazon before you commit, since that's the one number that could swing the decision.
are headphones waterproof
Not in the way a diving watch is, and these two aren't exceptions. Both the MINISO MS219 and the Oraolo Open Ear AC322 are rated IPX5, which means they resist sweat and light rain but are not designed to be submerged or worn swimming. Treat IPX5 as workout-and-drizzle protection, not waterproofing.
are headphones water resistant
Which one is better for studying, the MINISO MS219 or the Oraolo AC322?
For most study setups I'd point to the Oraolo AC322, because the open-ear design keeps you aware of your surroundings without ear canal fatigue over long sessions. The MINISO MS219 wins if you want the longest battery life, the fastest top-up and lower-latency Bluetooth 6.0 for video.
Neither data sheet lists active noise cancellation, and neither lists a transparency mode. The Oraolo AC322 achieves awareness through its open-ear design rather than software, while the MINISO MS219 is a hook-style on-ear fit that seals you in more with no transparency feature listed.
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