TOZO Crystal Buds EB-P3400

The mic quality is the headline here, ranking in the 91st percentile, which is one of the best call performances we've tested. But sound quality sits at the 5th percentile, one of the worst in our database. At BRL 320 with IPX8 waterproofing and 9-hour battery life, these are great for calls and terrible for music.

Let's start with the good news. The four-mic array with dual-mic AI noise reduction is doing serious work. A 91st percentile mic ranking means call quality is one of the best on the market right now, which is wild for earbuds at this price. The ANC also impresses at the 85th percentile, so background noise gets knocked down well above average. Bluetooth 5.3 keeps connectivity solid, though it's middle of the pack at the 69th percentile.

Now the bad news. The 6mm dynamic driver produces sound that ranks in the 5th percentile. That's one of the worst we've seen. The frequency response claims 18Hz to 20kHz, but hitting those numbers on paper doesn't mean much when the actual tuning falls this flat. The 16 preset EQs in the TOZO app might help a little, but they can't fix a fundamentally weak driver. Battery life is a bright spot at the 77th percentile, and comfort is decent at the 70th percentile. Build quality, though, sits at a disappointing 34th percentile.

Stacked against the Sony WF-1000XM6 or Technics EAH-AZ100, the Crystal Buds get absolutely smoked on sound. Those flagships sit near the top of our sound rankings while the TOZO sits at the 5th percentile. The Samsung Galaxy Buds3 Pro and Apple AirPods Pro 3rd Generation also crush it on build quality and overall polish. But here's the twist: the TOZO's mic ranking beats plenty of premium buds, and the IPX8 rating is more rugged than most flagships offer. The JLab Epic Lab Edition is probably the closest competitor in spirit, but even that has better sound. You're trading audio quality for call clarity and water resistance.

At BRL 320 in Brazil, these are cheap. And for call-heavy users, the 91st percentile mic performance makes them a bargain. But you're paying for call quality and waterproofing, not music. The 22.2 out of 100 music score means anyone expecting decent audio will feel ripped off. If you need buds for Zoom calls, workouts in the rain, or podcasts where voice clarity matters more than music, the value is there. If you want to enjoy your playlist, keep looking.

The TOZO Crystal Buds are a strange mix. The mic setup is genuinely impressive, landing in the 91st percentile of our database, and the ANC is a standout too at the 85th percentile. But the sound quality sits at the 5th percentile. That's not a typo. These buds are built for calls first, music a distant second.

You get Bluetooth 5.3, IPX8 waterproofing, a 6mm dynamic driver, and a case with an LED display showing remaining power. Battery life is solid at 9 hours from the buds and 40 total with the case. The price is around BRL 320 in Brazil, which puts these firmly in budget territory. For the right person, that's a steal. For everyone else, the music score of 22.2 out of 100 tells the real story.

Anyone who cares about music should skip these. The 5th percentile sound ranking and 22.2 out of 100 music score are hard to overlook. Build quality at the 34th percentile also feels cheap compared to competitors. And with only 4 reviews and a 28th percentile social proof score, there's not much community validation to lean on. If audio quality matters at all, spend your BRL 320 elsewhere.

The TOZO Crystal Buds are a niche product that nails their niche. If you take calls in noisy environments, work out in wet conditions, or just need reliable buds for voice, the 91st percentile mic and IPX8 rating make these a smart buy at BRL 320. But the 5th percentile sound quality is a dealbreaker for anyone who cares about music. These aren't all-rounders. They're call specialists, and they're honest about it.