We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-08 · 6 min read · Independent comparison
If you want maximum battery flexibility with a rugged, workout-proof build, choose ZZU Earbuds; if you need the newest Bluetooth, dual-device switching and the fastest emergency top-ups, choose OPPO Enco Buds3. Both are true wireless stereo earbuds aimed at people who care about sound, and both flirt with the "for audiophiles" crowd — but they get there in very different ways.
• ZZU Earbuds biggest strength: a 13.2mm dynamic driver tuned for big bass plus IPX7 waterproofing — the tougher, more sweat-friendly shell of the two.
• ZZU Earbuds biggest trade-off: older Bluetooth 5.3 and a plastic/silicone build that leans practical rather than premium.
• OPPO Enco Buds3 biggest strength: Bluetooth 5.4 with 47ms latency, dual-device connectivity and a 10-minute charge that yields hours of playback.
• OPPO Enco Buds3 biggest trade-off: IP55 only — dustproof and splash-resistant, but not built to be submerged like the ZZU pair.
• Pick ZZU Earbuds if you train hard, sweat a lot, or want the longest single-charge listening window.
• Pick OPPO Enco Buds3 if you juggle a phone and a tablet, game or watch video where lip-sync matters, and hate waiting on a charger.
The ZZU T18 is built around one clear idea: keep the music going, wherever you are. Its 13.2mm dynamic driver is the headline — the spec sheet describes deep bass, clear vocals and bright treble, with a 20Hz–20,000Hz range, which is exactly the tuning people chasing a big, energetic low end tend to reach for. If you like your playlists punchy rather than flat and clinical, the driver size here is a genuine argument in its favor. That's also why I'd put it on the shortlist for anyone hunting the best memory foam ear cushions wireless headset for audiophiles — the three included silicone tip sizes let you swap toward a tighter, more isolating seal, which is where bass and detail actually live on any in-ear.
Battery is the other pillar. ZZU quotes up to 9 hours of playback per charge and up to 48 hours total with the LED display case, and the case shows remaining power on a dual digital readout so you can plan instead of guess. Bluetooth 5.3 gives a 33-foot range and a claimed 0.05s latency, and the earbuds auto-pair the moment you lift them out of the case. Each bud weighs about 0.13 ounces, and the fit was developed with a large test group — the goal being low ear-canal pressure for all-day wear.
Where it pulls ahead for active users is IPX7. That's a waterproof rating, not just splash resistance, so sweat, rain and a rinse under the tap are within its comfort zone. Touch controls handle music, calls and your voice assistant, and the Type-C port keeps charging simple.
OPPO Enco Buds3: Who It's For
OPPO positions the Enco Buds3 squarely at "audiophiles and high-performance professionals," and the spec sheet backs the ambition. The 12.4mm dynamic driver covers the same 20Hz–20,000Hz range, and OPPO adds 3D Spatial Sound to the mix — a feature aimed at people who want a wider, more enveloping stage rather than a straight stereo image. If you're the type who reads about the best multipoint wireless headphones for audiophiles, this is the model in this pair that actually delivers multipoint: Bluetooth 5.4 supports dual-device connectivity, so audio switches between your phone and tablet without you re-pairing anything.
The battery story is where OPPO is most convincing. OPPO claims up to 9.5 hours on a single charge and up to 48 hours with the case, plus intelligent charging management designed to keep the battery healthy across thousands of cycles. The 10-minute fast charge is the real differentiator: a short top-up is quoted at roughly 3–4 hours of playback. That's the kind of feature that matters when you're walking out the door and the case is nearly empty.
Gaming and video get attention too. Bluetooth 5.4 brings 47ms ultra-low latency, which is the sort of figure that keeps audio and picture lined up in fast games and streamed shows. Touch controls are customizable, and a double-tap can fire your phone's camera shutter or wake Google AI Assistant. The enclosure is plastic in Slate Black, IP55-rated — dustproof and water-resistant, fine for gym sessions and drizzle, but not for swimming or heavy soaking. OPPO also lists a 24-month warranty, which is a meaningful confidence signal for a battery-dependent product.
Who should skip it? If you swim, train in heavy rain, or rinse your earbuds after every workout, IP55 will feel like a compromise next to IPX7. And if you only ever pair with one device, you're paying for connectivity features you won't use.
• Best for battery endurance per charge → ZZU Earbuds (up to 9 hours quoted) versus OPPO's 9.5 hours — close, but both are strong; OPPO edges it slightly.
• Best for fast top-ups → OPPO Enco Buds3, with a 10-minute charge quoted at 3–4 hours of playback.
• Best for water and sweat → ZZU Earbuds, thanks to IPX7 versus OPPO's IP55.
• Best for multipoint and device switching → OPPO Enco Buds3, via Bluetooth 5.4 dual-device connectivity.
• Best for low-latency gaming → OPPO Enco Buds3 (47ms) over ZZU's quoted 0.05s — check both claims against your own device, since latency depends on the phone too.
• Best for bass-forward everyday listening → ZZU Earbuds, with its 13.2mm driver and bass-tilted tuning.
• Best for spatial audio and customization → OPPO Enco Buds3, with 3D Spatial Sound and customizable touch controls.
• Best for a longer warranty → OPPO Enco Buds3 (24 months stated).
• Best for a lighter, more pressure-free fit → ZZU Earbuds, at roughly 0.13 ounces per bud with three tip sizes.
In my opinion, the OPPO Enco Buds3 is the stronger pick for most people shopping true wireless stereo earbuds for audiophiles. Bluetooth 5.4, multipoint, 47ms latency, 3D Spatial Sound and that 10-minute fast charge cover more real-world situations than a single extra waterproofing step does. I'd only steer you to the ZZU Earbuds if you're a heavy sweater, an outdoor runner, or someone who genuinely needs IPX7 and prioritizes bass-heavy tuning over connectivity features. Before you commit, check the current price on Amazon for both — the value math changes fast on earbuds like these.
how to connect true wireless stereo earbuds
Take both buds out of the charging case and they power on and enter pairing mode automatically. On your phone, open Bluetooth settings, select the earbud name from the list, and confirm. The ZZU T18 auto-pairs when removed from the case; the OPPO Enco Buds3 supports dual-device connectivity so you can pair a phone and a tablet together.
how to use true wireless stereo earbuds
Both models use touch controls on the buds themselves. ZZU uses its smart chip for tap gestures covering music, calls and your voice assistant. OPPO lets you customize the touch areas, and a double-tap can trigger your camera shutter or Google AI Assistant.
how to charge true wireless stereo earbuds
how to turn on true wireless stereo earbuds
In most cases you simply remove the buds from the charging case and they power on and reconnect automatically. If they stay off, a long touch on the control area usually powers them on — both the ZZU T18 and OPPO Enco Buds3 rely on touch-sensitive surfaces rather than physical buttons.
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