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 premium active noise cancellation in a sealed in-ear design, choose Sony WF-C700N; if you need open-fit earbuds that keep you aware of your surroundings, choose WALLA SOUND WallaBuds Fit Open. These two take opposite approaches to the same idea — personal audio on the move — and that single design difference should decide it for most buyers.
• Sony WF-C700N — biggest strength: Active Noise Cancellation, a sealed in-ear fit, and up to 35 hours of total playback. Biggest trade-off: the in-ear seal blocks your surroundings, and there's no open-fit option.
• WALLA SOUND WallaBuds Fit Open — biggest strength: an open-fit hook design that keeps you aware of traffic, coworkers, and gym surroundings, with Bluetooth 5.3 and USB-C fast charging. Biggest trade-off: no true Active Noise Cancellation — only Environmental Noise Cancellation for calls — and no passive isolation.
• Choose Sony WF-C700N if you want to shut the world out and hear your music, not the room.
• Choose WALLA SOUND WallaBuds Fit Open if you want to hear both at once, safely and comfortably.
• Short version: noise-cancelling immersion versus open-fit awareness.
The WF-C700N is built around one clear idea: replace the outside world with your audio. It uses Active Noise Cancellation, which means the earbuds actively reduce ambient sound rather than just covering it with volume. Combined with a rounded-tip in-ear fit, that creates a seal — and a seal is what makes bass feel full and voices feel close. If you've ever tried to enjoy a podcast on a plane or a bus with open earbuds, you already know why this matters.
Sony gives you a 40-ohm dynamic driver covering 20 Hz to 20,000 Hz, Bluetooth 5.2, and touch controls for playback, volume, and calls. Voice assistant support is included, and the earbuds ship with ear tips in multiple sizes, which matters more than people think — the seal only works if the tip actually fits your ear. Battery life is listed at up to 35 hours of playback with the charging case, and the earbuds carry a water-resistant design, so rain or sweat isn't an automatic dealbreaker. They weigh about 5 grams each and come in black with a matching case.
Who should skip it: if you need to stay aware of your environment — running on open roads, cycling, or working somewhere you need to hear colleagues — the sealed, noise-cancelling design works against you. There's also no headphone jack here, so everything runs over Bluetooth.
WALLA SOUND WallaBuds Fit Open: Who It's For
The WallaBuds Fit Open flips the priority. Instead of sealing you off, it uses an open-fit, hook-style design that rests over the ear and leaves the ear canal open. You hear your music and the world at the same time. That's the entire point, and it's what makes these genuinely useful in places where sealed earbuds are a bad idea — road running, cycling, gym floors, busy commutes, and open offices.
The sound side is handled by a dynamic driver with a 20 Hz to 20,000 Hz frequency range, and WALLA SOUND leans on powerful bass plus Environmental Noise Cancellation to keep your voice clear on calls. Note what ENC actually is: it reduces noise on the microphone side so the person you're talking to hears you better. It is not Active Noise Cancellation, and it won't quiet the room for you. That's a real trade-off, not a flaw — it's the price of the open design.
Battery is listed at up to 28 hours total: 8 hours per charge plus roughly 20 hours from the case. USB-C fast charging gets you a full recharge in about 1.5 hours, and the case holds a 500 mAh battery. Connectivity is Bluetooth 5.3 with one-touch multi-device pairing and a 10-meter range, and the build combines plastic with silicone for the hook, which is what keeps things comfortable during movement. IPX4 means sweat and light rain are fine. The package includes the earbuds, a USB-C cable, a protective case, and a manual, with a 90-day warranty.
Who should buy it: runners, cyclists, gym-goers, and anyone who needs to stay situationally aware while listening. Multi-device pairing is a nice touch if you bounce between a phone and a laptop.
Who should skip it: if your main goal is blocking out a noisy commute or a loud office, the open fit will let all of it in. There's also no Active Noise Cancellation and no headphone jack.
• Best for noise cancellation → Sony WF-C700N. Active Noise Cancellation is the headline feature here, and it's a fundamentally different tool from microphone-side ENC.
• Best for situational awareness → WALLA SOUND WallaBuds Fit Open. The open-fit hook design keeps your ears unobstructed by design.
• Best for total battery life → Sony WF-C700N. Up to 35 hours of playback with the case versus up to 28 hours on the WallaBuds.
• Best for single-charge longevity → WALLA SOUND WallaBuds Fit Open. 8 hours per charge plus a 20-hour case is a predictable split for long days.
• Best for running and cycling → WALLA SOUND WallaBuds Fit Open. IPX4 plus an over-ear hook and open audio is the safer, more stable combination for movement.
• Best for travel and commuting → Sony WF-C700N. The sealed fit and noise cancellation are made for planes, trains, and buses.
• Best for newer Bluetooth and fast charging → WALLA SOUND WallaBuds Fit Open. Bluetooth 5.3 with one-touch multi-device pairing and a 1.5-hour full recharge.
• Best for fit customization → Sony WF-C700N. Multiple ear tip sizes let you tune the seal, which also affects how much noise gets in.
• Best for warranty coverage → WALLA SOUND WallaBuds Fit Open lists a 90-day warranty; Sony's sheet doesn't specify a warranty period.
If I had to pick one, I'd take the Sony WF-C700N. In my opinion, Active Noise Cancellation plus a sealed, customizable in-ear fit is the more useful combination for everyday listening, and the longer battery figure gives it more headroom for travel days. I'd only steer you to the WALLA SOUND WallaBuds Fit Open if staying aware of your surroundings is non-negotiable — for running, cycling, or a workplace where you can't afford to be sealed off. In that case, the open-fit design isn't a compromise; it's the reason to buy.
FAQ
The Sony lists up to 35 hours of playback with the charging case. The WallaBuds list up to 28 hours total, split as 8 hours per charge and about 20 hours from the case. The Sony figure is the higher total.
They're built for it. The open-fit hook design keeps them stable and lets you hear traffic, and IPX4 covers sweat and light rain. The Sony earbuds are also water-resistant, but their sealed in-ear design shuts out the environment — which matters on open roads.
Yes. Prices move around, so check the current price on Amazon using the button on this page before you decide. Both are worth comparing on features first, then confirming the number that fits your budget.
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