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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want active noise cancellation, over-ear immersion and the longest single-charge playtime, choose Sony WH-CH720N; if you need open-ear awareness, waterproofing and a charging case that stretches total listening time to 50 hours, choose AOTONOK Open Ear Headphones. These two are built for opposite jobs, and once you see what each one is designed around, the decision stops being close.
• Sony WH-CH720N — biggest strength: Active Noise Cancellation with Dual Noise Sensor Technology and an Integrated Processor V1, plus up to 35 hours of playback on a single charge.
• Sony WH-CH720N — biggest trade-off: It's an over-ear, closed-back design, so it seals your ears and blocks the world out — the opposite of what runners and cyclists often want. It's also a manufacturer-refurbished unit with a 90-day limited hardware warranty rather than a new-condition one.
• AOTONOK Open Ear Headphones — biggest strength: An open-ear hook design with IPX7 waterproofing, Bluetooth 5.4, touch controls and a total of up to 50 hours of playtime (8 hours per charge plus 42 from the case).
• AOTONOK Open Ear Headphones — biggest trade-off: Because the drivers sit outside your ear canal rather than sealing it, you get ambient awareness but not the deep isolation or active noise cancellation the Sony pair is built around.
• Pick Sony WH-CH720N if you want to disappear into your music on a plane, in a noisy office, or on a long work-from-home day.
• Pick AOTONOK Open Ear Headphones if you want your ears open to traffic, gym noise and conversation while you run, ride or train.
The WH-CH720N is Sony's lightest wireless noise-cancelling headphone, and the design choices reflect that. The headband is slimmer and lighter than earlier generations, restructured to open up more space around the ears — which matters if you wear glasses, have larger ears, or just hate the clamp of a tight over-ear. At 6.72 ounces it's genuinely a headphone you can leave on through a full workday without thinking about it.
The headline feature is the noise cancelling. Dual Noise Sensor Technology paired with the Integrated Processor V1 is the core of the system, and Sony backs it with an Adjustable Ambient Sound mode that gives you 20 levels of how much outside noise gets let in. That's a bigger deal than it sounds: you can dial in full cancellation for a flight, then open it up a few steps to hear a train announcement or a barista calling your name without pulling the headphones off. Precise Voice Pickup Technology uses beamforming microphones to isolate your voice for calls, and the headphones support voice-assistant activation by saying "OK Google" or "Alexa."
Buy it if you want maximum immersion and long, uninterrupted sessions — flights, open-plan offices, focus work, movie nights. Skip it if you need to stay fully aware of your surroundings, or if you want a set you can sweat in and rinse off. That's not what this headphone is for.
AOTONOK Open Ear Headphones: Who It's For
The AOTONOK pair solves the exact problem the Sony pair creates. These are open-ear earbuds with soft silicone ear hooks that sit over your ear rather than inside the canal, so nothing is blocked. If you run on roads, ride a bike, or train in a gym where you need to hear what's happening around you, that design is the entire point — not a compromise.
They're rated IPX7 waterproof, which covers sweat, rain and splashes, and makes them a plausible pick for indoor and outdoor sessions alike. Connectivity is Bluetooth 5.4 with a stated range of up to 33 feet (10 meters), and the audio hardware is a 14.2 mm dynamic driver with acoustic tuning aimed at reducing sound leakage — the classic weakness of open designs. Whether it fully solves leakage is something only your own ears can judge, but the engineering intent is clearly there.
Battery is where AOTONOK pulls ahead on paper: 8 hours per charge plus 42 hours from the charging case, for up to 50 hours total. A 15-minute quick charge yields 2 hours of listening. Calls run through dual microphones with ENC noise cancelling, which is designed for busy streets and windy conditions — the exact environments these earbuds are meant for. Controls are touch-based for play/pause, track skipping, volume, calls and voice assistant, and they work with most iOS and Android devices.
One thing to flag plainly: the listing text mentions a 12-month warranty in one place and a 2-year warranty with a 1-month return window for quality issues in another. If warranty length matters to you, confirm the current terms before buying.
Buy it if you want awareness-first listening for running, cycling, commuting and workouts, plus a case that keeps you going for days between wall charges. Skip it if you want to shut out engine noise on a plane or block a loud office — open-ear buds simply aren't built for that.
• Best for noise cancellation → Sony WH-CH720N. Active Noise Cancellation with Dual Noise Sensor Technology and the V1 processor is its core purpose; AOTONOK has no ANC.
• Best for situational awareness → AOTONOK Open Ear Headphones. Open-ear hooks leave your canal unobstructed, which is the safe choice for road running and cycling.
• Best for single-charge battery life → Sony WH-CH720N. Up to 35 hours on one charge, versus 8 hours per charge for AOTONOK (42 more come from the case).
• Best for total battery with a case → AOTONOK Open Ear Headphones. Up to 50 hours combined, plus a 15-minute charge for 2 hours.
• Best for workouts and wet weather → AOTONOK Open Ear Headphones. IPX7 waterproofing and hook-based fit are built for sweat and rain; the Sony pair is not rated for that.
• Best for calls in noisy outdoor places → AOTONOK Open Ear Headphones on paper, thanks to dual mics with ENC; Sony counters with beamforming Precise Voice Pickup and voice-assistant support.
• Best for long desk sessions and flights → Sony WH-CH720N. Lightweight over-ear comfort, ambient sound in 20 steps, DSEE upscaling and a 3.5 mm wired fallback.
• Best for the latest Bluetooth → AOTONOK Open Ear Headphones. Bluetooth 5.4 versus Bluetooth 5 on the Sony.
In my opinion, these aren't really rivals — they're two tools for two different days. If I had to pick one for the way most people actually use headphones, I'd take the Sony WH-CH720N. The combination of real active noise cancellation, up to 35 hours per charge, 20-step ambient sound control, 3-minute quick charging and a genuinely light over-ear fit covers work, travel and focus listening in a way the open-ear design can't. But if your listening happens on a road, a trail or a gym floor, the AOTONOK Open Ear Headphones are the smarter buy — IPX7 waterproofing, an awareness-first fit and up to 50 hours with the case are exactly what that lifestyle needs. Check the current price on Amazon for whichever one matches your routine.
No. The Sony pair is a closed over-ear design with no IPX7 rating, so sweat and rain aren't its environment. The AOTONOK's open-ear hooks and IPX7 waterproofing are purpose-built for running.
Not active noise cancelling. AOTONOK has dual microphones with ENC, which targets call clarity, not blocking the world around you. The Sony WH-CH720N has genuine Active Noise Cancellation plus 20 levels of adjustable ambient sound.
Per charge, the Sony wins with up to 35 hours against AOTONOK's 8. Across a full cycle with the case, AOTONOK reaches up to 50 hours total, and its 15-minute charge gives 2 hours of playback.
It's a manufacturer-refurbished unit that Sony describes as showing limited or no wear, with all original accessories and a 90-day limited hardware warranty. If you want the full feature set — ANC, 35-hour battery, quick charging — it delivers the same design and specs.
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