How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a lightweight, clip-on open-ear sport headphone with a charging case and a huge total playtime window, choose Micool Ear Headphones; if you need a traditional over-ear headphone with bigger drivers, a 3.5 mm wired fallback and one very long single-charge battery, choose Wentronic Y04.
• Micool Ear Headphones — biggest strength: an open-ear, earhook-style fit (36 mm earcups with sponge covers) plus a charging case that pushes total listening time from 18 hours up to a claimed 52 hours.
• Micool Ear Headphones — biggest trade-off: it's an on-ear/open design, so it physically cannot seal around your ears the way a proper over-ear cup does, and the warranty is only 6 months.
• Wentronic Y04 — biggest strength: a true over-ear design with 40 mm drivers, ANC, 48 hours of battery life on a single charge and a 3.5 mm jack when you want to go wired.
• Wentronic Y04 — biggest trade-off: it's a bulkier purple plastic over-ear with no case mentioned and no stated charge time, so you're tied to how and where you charge it.
• Pick Micool if you run, cycle, work out or want an airy fit that doesn't press on your ears.
• Pick Wentronic Y04 if you want immersion, bigger sound drivers and a headphone you can also plug in with a cable.
The Micool Ear Headphones are built around one idea: keep your ears open. Instead of covering them, the earpieces clip onto the ear with an earhook and sit as small 36 mm on-ear units with sponge earcups. The company says the size was reduced specifically so you don't feel pressure or restraint while wearing them — which is exactly what you want if normal headphones start to ache after an hour.
The spec sheet reads like a sports headphone. Bluetooth 5.4 for pairing and connection stability, 27 mm dynamic drivers, ANC plus ENC adaptive noise reduction on the microphone side (four microphones total, with call noise suppression), and a multifunction button on each earpiece for music and calls. Battery is 18 hours per charge, and the included charging case lifts total listening to a claimed 52 hours. The case has a four-stage indicator light, each stage standing for 25% of its capacity, and charges over USB-C. There's also a cable in the box alongside the manual and case.
Who should buy it: runners, cyclists, gym-goers, commuters who want to stay aware of traffic, and students doing listening practice who don't want their ears blocked. The open, sponge-padded fit and light weight are the whole point. Who should skip it: anyone who wants isolation from a sealed cup, anyone who wants a wired option (there's no 3.5 mm jack here), and anyone who wants a long warranty — Micool lists 6 months, which is short.
The Wentronic Y04 goes the opposite direction. It's a minimalist over-ear headphone in purple plastic, with circular earcups and soft cushions designed for extended wear. Over-ear cushions surround your ears rather than pressing on them, which is the classic recipe for long listening sessions at a desk, on a plane or on the sofa.
The audio hardware is the headline: 40 mm dynamic drivers, a 20 Hz – 20,000 Hz frequency range, 32 ohm impedance and a stated 40 ms audio latency. That's a much larger driver than the Micool's 27 mm, and the full-range frequency response is what you'd want for music and media rather than just voice. Bluetooth 5.3 handles the wireless side, ANC blocks ambient background noise, and controls are physical push buttons built into the headphone — no touch panels to mis-hit.
The battery figure is the other standout: 48 hours average life, which is more than double the Micool's 18 hours per charge. There's also a 3.5 mm jack, so if the battery ever runs flat you can still listen wired — something the Micool simply cannot do. The trade-offs are real, though: it's plastic, it's purple only, there's no charging case mentioned, no charge time is stated, and the warranty description is just "1" with no unit given, so I wouldn't read much into it either way.
Who should buy it: home listeners, travellers, commuters who want noise blocked out rather than let in, and anyone who wants one long-lasting headphone that also works plugged in. Who should skip it: runners and gym users who need an open, secure, sweat-friendly clip-on fit, and anyone who dislikes bulk on their head.
• Best for running and outdoor sport → Micool Ear Headphones. Open-ear, clip-on, 36 mm earpieces, no ear compression.
• Best for immersion and music quality → Wentronic Y04. 40 mm dynamic drivers and a full 20 Hz – 20,000 Hz range beat 27 mm open drivers on paper.
• Best single-charge battery → Wentronic Y04. 48 hours versus 18 hours.
• Best total battery with the case → Micool Ear Headphones. Up to a claimed 52 hours including the charging case.
• Best for calls → Micool Ear Headphones. Four microphones with ANC + ENC adaptive noise reduction aimed at call clarity.
• Best for wired backup → Wentronic Y04. A 3.5 mm jack; the Micool is wireless only.
• Best for wearing all day without pressure → Micool Ear Headphones. Sponge earcups and a deliberately small, light build.
• Best for blocking out a noisy room → Wentronic Y04. Over-ear cushions plus ANC physically seal and cancel better than an open design.
My Verdict
Micool. Its open-ear earhook design with 36 mm sponge-covered earpieces is made to sit on the ear without blocking it, which suits sport better than Wentronic's over-ear cups.
Yes. It includes a 3.5 mm jack alongside Bluetooth 5.3, so you can listen wired. The Micool Ear Headphones are wireless/Bluetooth only.
Wentronic Y04 lists 48 hours of battery life per charge. Micool lists 18 hours per charge, but its charging case extends total listening to a claimed 52 hours.
Micool. It specifies four microphones with ANC + ENC adaptive noise reduction for call noise suppression. Wentronic lists ANC and button controls but doesn't detail its microphone setup.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.