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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a sweat-proof, ear-hook sport earbud that stays put through hard workouts, choose Redzoo Headphones V5.0; if you need marathon battery life and an over-ear design for travel, work and long listening sessions, choose Picun B8.
• Redzoo Headphones V5.0 – biggest strength: IPX7 waterproofing plus an ear-hook, in-ear fit built specifically for running, gym work and sweaty sessions.
• Redzoo Headphones V5.0 – biggest trade-off: 16 hours per charge and a wired-free design with no audio jack, so you must remember to plug it in every couple of days.
• Picun B8 – biggest strength: A huge 120-hour battery from a 1000mAh cell — roughly a month of listening at four hours a day.
• Picun B8 – biggest trade-off: An over-ear build that weighs far more and is not rated waterproof, so it is not the one you want for heavy sweating in the rain.
• Who each pick is for: Redzoo for runners, gym-goers and anyone who needs earbuds that grip and survive moisture. Picun B8 for commuters, travellers, students and desk workers who want long battery, a foldable over-ear and optional wired listening.
The Redzoo Headphones V5.0 is a sport-first pair of earbuds, and its whole design tells you that. The ear-hook plus in-ear fitting is meant to keep the bud locked in place during strenuous movement — running, jogging, cycling, climbing, gym work, yoga. That hook is the reason it is not going to pop out mid-sprint the way a plain rounded-tip bud can. Redzoo also includes eartips in XS, S, M and L, which matters more than people think: the right tip size is what gives you a proper seal, and a proper seal is what gives you the bass these 11mm dynamic drivers are tuned to deliver.
On the audio side, the specs are sensible for the category: 11mm dynamic drivers, a 20Hz–20,000Hz frequency range, SBC and AAC codecs, and cVc6.0 noise-cancelling microphones for calls. AAC support is a genuine plus if you are on an iPhone or a device that handles it well — it usually means cleaner streaming than plain SBC alone. The cVc6.0 mic array is aimed at voice pickup, so taking a call mid-workout is realistic rather than an afterthought. Bluetooth 5.0 gives you a 10-metre range and, usefully, the ability to stay connected to two devices at once — laptop and phone, for example.
Then there is the durability story. IPX7 waterproofing plus an internal nano-coating means sweat and heavy rain are not a threat. If your workouts leave you drenched, or you run outdoors in unpredictable weather, that rating is the headline feature here. Battery is 16 hours of playback from a 2-hour charge, and the remaining battery level shows on your phone screen — a small thing, but it saves you from guessing.
Who should buy it: runners, gym regulars, cyclists, anyone whose earbuds die from sweat before they die from age. Who should skip it: if you want to binge a full week of podcasts without charging, or you prefer the feel of a cushioned over-ear cup, this is not the shape for you. It is in-ear, it is plastic, it is black, and it is built to move. Nothing more, nothing less.
The Picun B8 is the opposite philosophy: sit down, get comfortable, and forget about charging. Its 1000mAh battery is rated for more than 120 hours of playback after a 3-hour charge. Picun frames that as roughly 30 days of listening at four hours a day, and that maths holds up. For a commuter, a student, a long-haul traveller or someone who works at a desk all day, that is the single most compelling thing about this headphone — you simply stop thinking about the charger.
The sound design is a step up in scale too. Dual 40mm dynamic drivers, 32 ohm impedance and 42dB sensitivity, with a 20Hz–20,000Hz range. Bigger drivers in a bigger acoustic chamber generally give you more body and a wider sense of space than tiny in-ear units, and Picun backs that with three EQ modes — Pop, Bass boost and Rock — cycled with a double-press of the EQ button. If you like tweaking the sound to the track, that is a real feature rather than a gimmick. There is also a low-latency mode you toggle by pressing the power button three times, which is the sort of thing that matters if you watch video or game on the same pair.
Comfort is clearly the other priority. PU leather earcups over highly elastic sponge, an adjustable headband, and 60° rotating earmuffs so it adapts to different head sizes. It folds, which makes it a genuinely travel-friendly over-ear. Connectivity is Bluetooth 5.3 with a 33-foot range, multipoint connection, and — importantly — a 3.5mm jack so you can run it wired when the battery is empty or when you want zero latency. Controls are touch-based for volume and calls, with a built-in mic for hands-free use.
Who should buy it: commuters, travellers, students, office workers, movie watchers and gamers who want long battery, a foldable over-ear and the option of a cable. Who should skip it: anyone who needs waterproofing or a secure fit for running. There is no IPX rating here, and at roughly 12.3 ounces it is a sit-down headphone, not a sprinting one. Also worth noting: Picun specifies 5V/1A or 5V/2A charging only, and warns against fast chargers, so use a standard adapter.
Side-by-Side: Which Should You Choose?
• Best for workouts and running → Redzoo Headphones V5.0. Ear-hook fit plus IPX7 waterproofing is exactly what exercise demands.
• Best for sweat and rain → Redzoo Headphones V5.0. IPX7 and nano-coating; the Picun B8 has no waterproof rating.
• Best for travel and commuting → Picun B8. Foldable over-ear design, multipoint and a huge battery mean fewer cables and fewer worries.
• Best for sound tuning options → Picun B8. Three EQ modes and dual 40mm drivers give you more ways to shape the audio.
• Best for wired backup → Picun B8. It has a 3.5mm jack; the Redzoo is wireless-only with no jack.
• Best for calls on the move → Redzoo Headphones V5.0. cVc6.0 noise-cancelling mics and dual-device connection suit active use.
• Best for all-day desk comfort → Picun B8. PU leather and elastic sponge over-ear cups are built for long sessions.
In my opinion, the right answer depends entirely on where you listen, not on which one is "better". If I were buying for the gym, for running or for any activity where sweat and movement are the enemy, I would buy the Redzoo Headphones V5.0 — the IPX7 rating and ear-hook fit are the two features that actually solve that problem. If I were buying for commuting, travel, study or desk work, I would buy the Picun B8, because 120 hours of battery, a foldable over-ear build and a 3.5mm wired option make it the more versatile everyday headphone. Pick the one that matches your routine and you will be happy with either.
Yes — it carries an IPX7 waterproof rating along with an internal nano-coating, which is why it is marketed for sweat, heavy rain and strenuous workouts. That is a meaningful advantage over the Picun B8, which has no waterproof rating listed.
The Picun B8 is rated for more than 120 hours of playback from a 1000mAh battery after a 3-hour charge. The Redzoo Headphones V5.0 is rated for up to 16 hours after a 2-hour charge. For frequent charging avoidance, the Picun B8 wins clearly.
Yes. The Picun B8 includes a 3.5mm audio cable and has a 3.5mm jack, so you can listen wired. The Redzoo Headphones V5.0 has no headphone jack and is Bluetooth-only.
The Redzoo Headphones V5.0. Its ear-hook and in-ear design is built for stability during movement, and its IPX7 rating protects it from sweat and rain. The Picun B8 is an over-ear headphone with no water resistance, so it is better suited to stationary listening.
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