We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-25 · 6 min read · Independent comparison
If you want an open-ear clip design with the longest total battery life and the strongest call-noise spec in this matchup, choose QCY Crossky C50; if you need earbuds built specifically for small ears that sit fully inside and disappear, choose VISOUND VionB Air Invisible.
• QCY Crossky C50 — biggest strength: 35 hours of total playtime, Bluetooth 6.0, four microphones with up to 45dB call noise cancellation, and an open-ear clip fit that leaves your ear canal open.
• QCY Crossky C50 — biggest trade-off: It's an open-ear design, so it doesn't seal your ear canal, and the 45.6 g total package is heavier than the tiny in-ear alternative.
• VISOUND VionB Air Invisible — biggest strength: A 3 g-per-bud, zero-stem, flush-fit in-ear design made for small ear canals, with active noise cancellation and a 24-hour total battery figure.
• VISOUND VionB Air Invisible — biggest trade-off: Its per-charge listening time is 6 hours versus the QCY's 7.5, and the design is aimed at small ears specifically rather than everyone.
• Who the QCY is for: Runners, cyclists, outdoor workers and anyone who wants situational awareness plus long battery life.
• Who the VISOUND is for: People with small ear canals, or anyone who wants earbuds that disappear into the ear for work, meetings and travel.
The QCY Crossky C50 is an open-ear clip-style earbud, and that single design choice shapes everything else about it. Instead of pushing a tip into your ear canal, it hooks onto the outside of your ear with soft silicone and a flexible titanium memory alloy frame. That means nothing is plugging your ear, so you stay aware of traffic, training partners and announcements while music or a podcast plays. For running, cycling and gym work, that's a real functional advantage, not just a comfort preference.
Where it pulls ahead on paper is endurance and calls. QCY lists 7.5 hours of listening per charge and up to 35 hours total with the charging case, which is the kind of figure that covers a full workday plus a commute without hunting for a cable. The four-microphone array combines wind-noise reduction with up to 45dB of call noise cancellation, which is exactly the combination that matters if you take calls outdoors. Bluetooth 6.0, dual-device connection and app-based EQ and button customization round it out — you can be on a call and still have your laptop connected.
The trade-offs are honest ones. Open-ear means no ear-canal seal, so deep bass isolation isn't the point; QCY instead leans on reverse soundwave technology that it claims cuts sound leakage by 90% compared to standard open-ear buds. IPX5 covers sweat, splashes and light rain, but it is not a swimming or submersion rating. And at 45.6 g for the whole package, this is not a featherweight in-ear bud. If you want an invisible, sealed fit, skip it. If you want awareness, battery and call clarity outdoors, this is the pick.
The VISOUND VionB Air Invisible takes the opposite approach: it goes inside. Each bud weighs about 3 grams, and the zero-stem, flush-fit shape sits fully within the ear canal so nothing protrudes to catch on hair, a helmet strap or a collar. VISOUND explicitly targets people with smaller ear canals who find standard earbuds either painful or prone to popping out — the tapered body is meant to remove the pressure that makes people give up on wireless earbuds after twenty minutes.
Battery is quoted at 6 hours per charge with up to 24 hours total from the USB-C case, and the case includes a digital LED display so you can see the remaining charge at a glance. You get touch controls for playback, calls and volume, plus voice-assistant activation, and the spec sheet lists active noise cancellation alongside an ENC microphone for calls. The IPX5 rating covers sweat and splashes, so gym sessions and outdoor runs are within scope — same water-resistance tier as the QCY, different fit philosophy.
The compromises are equally clear. Six hours per charge is shorter than the QCY's 7.5, and the in-ear seal that makes it discreet also means you're cut off from your surroundings — a downside if you run on roads or need to hear a colleague calling your name. The Rose Quartz finish is the only color listed. And if your ears aren't small, the whole premise of the design is less relevant to you. Choose this one for disappearing into a meeting, a flight or a commute, not for maximum battery.
• Best for battery life → QCY Crossky C50. 35 hours total and 7.5 hours per charge versus 24 hours total and 6 hours per charge.
• Best for call clarity outdoors → QCY Crossky C50. Four mics, wind-noise reduction and up to 45dB call noise cancellation are built for exactly that scenario.
• Best for small ears → VISOUND VionB Air Invisible. It's designed specifically for smaller ear canals that reject standard earbuds.
• Best for a discreet, invisible look → VISOUND VionB Air Invisible. The zero-stem flush-fit profile sits fully inside the ear with nothing sticking out.
• Best for running and cycling awareness → QCY Crossky C50. Open-ear means you still hear traffic and surroundings.
• Best for flights, meetings and focused listening → VISOUND VionB Air Invisible. The sealed in-ear fit plus active noise cancellation blocks the room out.
• Best for the lightest possible wear → VISOUND VionB Air Invisible. Roughly 3 g per bud versus a 45.6 g total package for the QCY.
• Best for pairing flexibility → QCY Crossky C50. Bluetooth 6.0 with simultaneous dual-device connection lets you move between phone and laptop.
• Best for water resistance parity → a tie. Both are rated IPX5, which handles sweat, splashes and light rain but not submersion.
In my opinion, if you're buying for workouts and outdoor time, the QCY Crossky C50 is the one I'd take: the open-ear fit keeps you safe and aware, the 35-hour total battery removes charging anxiety, and the four-mic system with 45dB noise cancellation is the more convincing call setup for noisy environments. I'd only steer you to the VISOUND VionB Air Invisible if small ears or true invisibility is your deciding factor — that's where its 3 g flush-fit design genuinely wins. Check the current price on Amazon before you commit, since that's the one variable that can flip this decision either way.
are headphones waterproof
Generally, no — and neither of these two is. Both the QCY Crossky C50 and the VISOUND VionB Air Invisible carry an IPX5 rating, which covers sweat, splashes and light rain, but it is not a waterproof or submersible rating. Don't swim or shower in either pair.
are headphones water resistant
Yes, these two are. IPX5 is a water-resistance rating, and both products list it explicitly — QCY describes it as withstanding intense workouts, light rain and daily splashes, and VISOUND lists sweat- and splash-resistance for gym sessions and runs. That's enough for exercise and weather, not for immersion.
The core difference is fit philosophy. The QCY is an open-ear clip design that leaves your ear canal open and runs up to 35 hours total with Bluetooth 6.0 and four mics. The VISOUND is a 3 g in-ear bud built for small ear canals, with a flush invisible profile, active noise cancellation and up to 24 hours total.
The QCY Crossky C50 lasts longer on paper: 7.5 hours per charge and up to 35 hours with the case, against 6 hours per charge and up to 24 hours for the VISOUND. If battery endurance is your priority, the QCY is the clear choice.
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See also: Amazon Renewed Beats Studio Pro vs QCY Crossky C30S, JLab Epic Air Sport vs SteelSeries Arctis Nova 7, Xmenha Invisible Sleep Earbuds vs INSONIXN Mini Sleep Earbuds