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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-30 · 7 min read · Independent comparison
• TOYOURKI Single Left Ear — biggest strength: it is a drop-in replacement bud for a Beats Studio Bud, matching the original in design, size and case compatibility, with active noise cancellation, transparent mode, Bluetooth 5.2, touch controls and voice assistant access.
• TOYOURKI Single Left Ear — biggest trade-off: it is one earbud, built for the "Studio Bud" model and not the Bud+, so it only makes sense if you already own that set and only need to replace a single side.
• Thunelec Earbuds — biggest strength: a full pair with 45dB ANC plus ENC, a transparency mode, 48 hours of total playback with the case, IPX7 waterproofing, Bluetooth 5.4 and a full-color touch screen on the case.
• Thunelec Earbuds — biggest trade-off: it is a self-contained system, so the case, screen and controls are all part of the package; the earbuds also don't support direct volume control, which you handle on the case screen or your phone.
• Who TOYOURKI is for: someone holding a Beats Studio Bud set with one dead or missing bud.
• Who Thunelec is for: someone buying a whole new pair from scratch and wanting the most features per earbud.
This is not a "buy a new pair of earbuds" product, and that's exactly the point. TOYOURKI Single Left Ear is a replacement earbud for the Beats Studio Bud — specifically, not the Bud+. It's a black in-ear bud with a plastic and silicone build, and it's designed to match the original in size, shape and fit so it slides into your existing Studio Bud charging case without any modification. If you've lost the left bud, or the left bud stopped charging, this is the fix that keeps the rest of your kit alive.
Functionally, it aims to be a 1:1 stand-in. The sheet lists Bluetooth 5.2, touch controls, voice assistant access, active noise cancellation and transparent mode — the same feature set as the original bud, which matters most for transparent mode headphones users. Transparent (or transparency) mode is the setting that pipes outside sound through the earbuds so you can hear traffic, a barista or a coworker without pulling the bud out. If you rely on that for city walks or quick conversations, a replacement bud that supports it keeps your routine unchanged. Pairing is meant to be automatic: drop it in the case, and it syncs with the device you already have paired.
Who should buy it: anyone who owns Beats Studio Buds (again, not Bud+) and needs one working side back. It's also the sensible pick if you've customized your fit, your case and your habits around that set and don't want to rebuild all of that. Who should skip it: anyone who doesn't own Studio Buds, anyone with a Bud+ model, and anyone who actually wants a fresh pair with modern extras like a screen case or a higher Bluetooth version — this bud won't give you that. It's a repair, not an upgrade. The single bud ships with ear cushions and carries a one-year manufacturer warranty.
Thunelec Earbuds are a complete, self-contained pair in milky white, and they read like a spec sheet built to cover every commuter complaint at once. The headline is noise cancelling: up to 45dB of active noise cancellation, which the sheet frames as blocking roughly 90% of distractions like traffic, blower noise and office chatter, plus ENC on the mic side to keep your voice clear on calls. Then there's the transparency mode — the same idea as the TOYOURKI bud's transparent mode, letting surrounding sound in so you stay aware while walking or taking a call. For anyone searching for transparent mode headphones, this pair treats it as a core feature rather than an afterthought.
Battery is the other big story. Thunelec lists 6–8 hours of continuous playback per charge and 48 hours total with the case, with the case recharging in about 1.5 hours and a smart indicator showing battery level. Bluetooth 5.4 is the newest version in this comparison, and the sheet claims 98% connection stability with smooth multi-device switching. The audio hardware is a 14.2mm bio-carbon fiber dynamic driver covering 20Hz–20kHz, tuned for deep bass down to 50Hz, with five EQ modes (standard, classic, jazz, rock, pop) you can flip between depending on whether you're on TikTok, a podcast or a call.
Then there's the case itself, which is the real differentiator: a full-color touch screen. You control playback, track skipping, calls and noise cancelling with a tap on the case or the buds — no app diving. It also handles 7-language switching, wallpaper customization, brightness, a headphone finder and a timer. One caveat from the sheet: there's no direct volume control on the buds, so volume goes through the case screen or your connected device.
Who should buy it: commuters, gym-goers and travelers who want one pair to do everything — strong ANC, a transparency mode, IPX7 sweat and rain resistance, three ear tip sizes (S/M/L) and a case that doubles as a control panel. Who should skip it: people who dislike touch interfaces, anyone who wants volume buttons on the bud itself, and anyone who only needs to replace a single Beats bud — buying a whole new pair is the wrong tool for that job.
Side-by-Side: Which Should You Choose?
• Best for battery life → Thunelec Earbuds. 6–8 hours per charge and up to 48 hours with the case, versus no battery figures listed for the single replacement bud.
• Best for noise cancelling on paper → Thunelec Earbuds. Up to 45dB ANC plus ENC for calls, a more detailed spec than the TOYOURKI's listed active noise cancellation.
• Best for staying aware of your surroundings → both, but differently. The TOYOURKI bud inherits the Beats transparent mode; Thunelec builds transparency mode in as a named feature alongside its ANC.
• Best for workouts and weather → Thunelec Earbuds. IPX7 waterproofing, three ear tip sizes and a silicone enclosure.
• Best for the newest connection standard → Thunelec Earbuds. Bluetooth 5.4 versus Bluetooth 5.2.
• Best for keeping your existing case and fit → TOYOURKI Single Left Ear. It syncs with the Studio Bud case you already own, no extra setup.
• Best for hands-on control without your phone → Thunelec Earbuds. The full-color touch screen case handles playback, calls, EQ and noise modes.
If I owned Beats Studio Buds and lost one bud, I'd buy TOYOURKI Single Left Ear — no hesitation. It's the targeted fix, it keeps your case and fit, and it preserves transparent mode, which is the feature people miss most when a bud goes missing. If I were starting from zero and wanted a pair that covers commuting, calls, workouts and travel with battery headroom and a control screen, I'd buy Thunelec Earbuds. In my opinion, the deciding question isn't which is "better" — it's whether you're repairing a set or building one. Repair the Beats set with TOYOURKI; build fresh with Thunelec. Check the current price on Amazon for whichever path fits you before you commit.
what is transparency mode in headphones
Transparency mode is a setting that uses the earbuds' microphones to let outside sound in, so you can hear traffic, announcements or someone talking to you without removing the buds. On both products here it works alongside active noise cancellation, letting you switch between blocking the world out and staying aware of it.
how to turn off transparency mode headphones
You switch it off by cycling through the listening modes — usually a tap or press on the earbud or, with Thunelec, on the touch screen case — moving from transparency back to ANC or normal mode. On the TOYOURKI replacement bud, it follows the same Beats Studio Bud controls you already use.
what's transparency mode headphones
It's the common shorthand for earbuds that can pass ambient sound through on demand rather than sealing you off. The point is safety and convenience: you keep your music playing but still hear what's happening around you, which is why it's popular with commuters and cyclists.
No — the data sheet notes the earbuds don't support direct volume control, so you adjust volume through the charging case's touch screen or on your paired device. Everything else, including playback, track skipping, calls and noise modes, is handled by touch.
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