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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-19 · 7 min read · Independent comparison
That's the whole comparison in one line. These two products share a category page and almost nothing else. One is an empty protective box. The other is a working pair of open-ear earbuds. The only reason they get compared is that both show up when you search for headphone gear, and both have "headphone" somewhere in the title. So before anything else: figure out which job you have. Storing something, or listening to something.
• Mchoi's biggest strength: a rigid EVA hard shell sized to fit the Philips K4206 Kids Wireless On-Ear Headphones, with a mesh pocket for accessories and a reinforced carry handle.
• Mchoi's biggest trade-off: it is a case only. No headphones, no cable, no charger. If you don't already own the K4206, this product does nothing for you.
• RICHJOY's biggest strength: a complete audio product — clip-on open-ear earbuds with Bluetooth 6.0, ENC call noise cancellation, IPX5 water resistance and up to 40 hours of total playtime with the charging case.
• RICHJOY's biggest trade-off: open-ear design means sound is directed into the ear canal rather than sealed inside it, so isolation is limited by nature, and the C-shaped clip fit won't suit everyone.
• Choose Mchoi if you own the Philips K4206 kids headphones and want them protected between uses.
• Choose RICHJOY if you want earbuds for running, cycling, driving or workouts and don't want anything plugged into your ear canal.
This is a single-purpose product, and I mean that as a compliment. Mchoi built a case that fits one specific headphone — the Philips K4206 Kids Wireless On-Ear Headphones — and didn't try to be universal. The external dimensions land at roughly 7.8 by 2.7 inches, and the maximum compatible device size is listed at 7.8 inches. The shell is EVA, a foam-like material that holds its shape, so the case resists the kind of bumps, dents and scratches that happen when a kids' headphone gets tossed into a school bag or the back seat of a car. The water resistance level is listed as waterproof, which matters more than it sounds like it should when a water bottle leaks inside a backpack.
The practical details are sensible. There's a built-in mesh pocket that can hold the headphones plus accessories, and a reinforced handle for carrying. The color is purple, and the age range is described as kids and child — this is clearly aimed at parents buying gear for a child, not at audiophiles.
RICHJOY Open Ear Earbuds: Who It's For
The RICHJOY O301 is the opposite kind of product: a full electronics purchase with a spec sheet you can actually evaluate. Each earbud weighs 4.8 grams, and the C-shaped design clips over the ear rather than sitting inside it. That's the defining feature. Open-ear means the ear canal stays open, which is exactly why this style has taken off for running, cycling and driving — you can hear traffic, a training partner, or a flight attendant while your music keeps playing.
The audio side is more considered than the price-adjacent category usually manages. There's directional audio technology that aims sound waves into the ear canal while minimizing leakage, and the impedance is listed at 16 ohm. RICHJOY describes the tuning as rich and dynamic with deep bass and clear highs — that's the manufacturer's framing, not a measurement, so treat it as a design intent rather than a guarantee. Calls get ENC, or Environmental Noise Cancellation, which uses the microphone to reduce wind and background noise. If you take meetings on the move, that's the feature doing the work.
Battery is where this product makes its strongest case. Up to 40 hours of total playtime with the charging case, and the case has a built-in digital display showing real-time battery level. That last detail is genuinely useful — no guessing whether you have 10 percent or 60 percent left before a long ride. Connectivity is Bluetooth 6.0, and RICHJOY lists compatibility with iPhone, Android, iPad, PC and more. IPX5 water resistance covers sweat, rain and splashes, which is the right rating for high-intensity training. Controls are touch-based: long-press the left earbud to lower volume, long-press the right to raise it. Pairing is automatic out of the case — you look for "O301" in your Bluetooth list. There's a 1-year manufacturer warranty, and a reset procedure if things go sideways.
Who should buy it: runners, cyclists, gym-goers, drivers, and anyone who finds in-ear buds uncomfortable after an hour. Who should skip it: people who want deep noise isolation on a plane or in a loud open office, and anyone who prefers a physical button over touch controls. Open-ear is a trade-off, not a free upgrade. You get awareness and comfort; you give up the sealed-in quiet.
• Best for protecting existing gear → Mchoi Shockproof Carrying Case. It exists to shield one specific headphone.
• Best for actually listening to audio → RICHJOY Open Ear Earbuds. It's a complete product; Mchoi's is not.
• Best for workouts and outdoor training → RICHJOY. IPX5, 4.8-gram earbuds, C-shaped secure fit.
• Best for kids' gear storage → Mchoi. Purple EVA hard shell, mesh pocket, carry handle, sized for the Philips K4206.
• Best for battery life → RICHJOY. Up to 40 hours total with the case, plus an on-case battery display.
• Best for calls on the move → RICHJOY. ENC noise cancellation targets wind and background noise.
• Best for travel with a child's headphones → Mchoi. Hard shell plus handle; it's built to be carried.
• Best for situational awareness → RICHJOY. Open-ear design leaves your ear canal unobstructed.
• Best for a gift you're unsure about → neither, without checking. Mchoi needs the K4206 already owned; RICHJOY needs the recipient to want open-ear fit.
If I had to pick one, I'd buy the RICHJOY Open Ear Earbuds. In my opinion, it's the more useful product by a wide margin — it does something on its own, while the Mchoi case only adds value if you already own the exact headphone it was molded for. That said, this isn't really a contest; it's a filter. Own the Philips K4206? The Mchoi case is a smart, cheap-feeling-risk purchase and I'd take it. Want earbuds for training or commuting? RICHJOY is the answer, and the Mchoi case is irrelevant to you. Check the current price on Amazon for whichever one matches your actual need before deciding.
No. It's molded for that specific headphone and listed with a maximum compatible device size of 7.8 inches. Buy it as protection for gear you already have, not as a general-purpose case.
Do the RICHJOY Open Ear Earbuds block out noise?
That's what they're designed for. IPX5 resists sweat and splashes, the C-shaped clip is described as stable during long exercise, and each bud weighs 4.8 grams. The 40-hour total playtime with the case suits a week of sessions.
Take them out of the charging case and they enter pairing mode automatically. Select "O301" in your phone's Bluetooth list. Volume is adjusted by long-pressing the left earbud to lower and the right to raise.
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