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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 traditional over-ear music headphone with active noise cancelling and a 50-hour battery, choose Bluedee Headphones; if you need an open-ear, fully waterproof set for swimming and workouts with built-in MP3 storage, choose kelankeke Bone Conduction Headphones. These two are not really rivals — they solve completely different problems. One is built for immersive listening; the other is built for moving your body, in and out of the water.
• Bluedee Headphones — biggest strength: Active Noise Cancellation, Hi-Res audio and a 50-hour battery in a foldable over-ear design with 40 mm dynamic drivers and a 3.5 mm wired backup.
• Bluedee Headphones — biggest trade-off: It's a sealed over-ear headphone. No waterproofing rating at all, and it can't go near a pool.
• kelankeke Bone Conduction Headphones — biggest strength: IPX8 waterproofing plus 32 GB of built-in MP3 memory, so you can listen underwater with no phone and no Bluetooth.
• kelankeke Bone Conduction Headphones — biggest trade-off: No active noise cancelling, no wired jack, and only 10 hours of playback. It's also 8 ohm, so it won't deliver deep, punchy bass the way an over-ear will.
• Who Bluedee is for: commuters, flyers, office workers and anyone who wants rich music and quiet.
• Who kelankeke is for: swimmers, runners and gym users who want their ears open and their music stored on the headset itself.
Bluedee Headphones are a classic over-ear Bluetooth headphone, and the spec sheet reads like one. Bluetooth 5.2 with a 10-metre range, 40 mm dynamic drivers, a 32 ohm impedance and a 2 Hz–20,000 Hz frequency range. That impedance figure matters: 32 ohm is a friendly load that plays nicely with phones, laptops and tablets without a separate amp. The 2 Hz low end is where the "deep bass" claim comes from, and combined with the 40 mm driver it's the kind of tuning that gives music real weight.
The headline feature is Active Noise Cancellation. Buttons on the earcup handle volume, calls and noise control, and there's a cVc 8.0 microphone setup for voice pickup on calls. If you've ever tried to take a meeting on a train, you know why that matters. And because it also has a 3.5 mm jack, you can run it wired when the battery is flat or when you want zero latency — a genuinely useful fallback that a lot of wireless headphones skip.
Who should buy it? Anyone whose main goal is music. Travel, home office, study sessions, gaming, movies — the sealed over-ear design with ANC is exactly what you want when you're trying to shut the world out. Who should skip it? Swimmers, obviously, since there's no waterproof rating, and anyone who wants to hear traffic while running. It's also the wrong pick if you hate the feeling of something pressing on your ears for hours.
kelankeke Bone Conduction Headphones: Who It's For
The kelankeke set is a completely different animal. It's an open-ear bone conduction headphone, model E9 Pro, weighing just 27.8 g — 30 grams in the marketing language — with a silicone build that sits outside your ear canal rather than over it. Nothing goes inside your ear, which is the whole point: you keep your ambient awareness while music plays through your cheekbones.
The marquee spec is IPX8. That's the highest common waterproof rating, and it's the reason these exist. You can wear them swimming, snorkelling, fishing or boating, and they'll shrug off sweat and rain too. There's one catch the manufacturer is upfront about: Bluetooth doesn't transmit underwater, so for swimming you must switch to MP3 mode by double-clicking the power button.
That's why the 32 GB of built-in memory is the real story here. It holds roughly 8,000 songs and supports MP3, WMA, FLAC, APE and WAV. Magnetic charging does double duty — plug the cable into a computer and the headphones show up as USB storage, so you just drag your files across. Underwater, no phone, no signal, no problem. Charge time is 2 hours for up to 10 hours of playback.
Bluetooth 6.0 is the wireless standard here with a 10-metre range, and it works with iOS and Android for music, audiobooks and calls. Controls are physical buttons — play, pause, track skip, answer/hang up, mode switching — which is exactly what you want when your hands are wet. Noise control is listed as passive, meaning there's no ANC; you hear your surroundings, and that's deliberate.
Side-by-Side: Which Should You Choose?
• Best for music quality and bass → Bluedee Headphones. 40 mm dynamic drivers, 32 ohm, Hi-Res audio and a 2 Hz–20 kHz range are built for full, rich sound.
• Best for battery life → Bluedee Headphones. 50 hours versus 10 hours is not close.
• Best for swimming → kelankeke Bone Conduction Headphones. IPX8 plus 32 GB MP3 mode is the only way either set works underwater.
• Best for commuting and flights → Bluedee Headphones. Active Noise Cancellation and a sealed over-ear fit are made for noisy cabins and crowded trains.
• Best for running and cycling → kelankeke Bone Conduction Headphones. Open-ear design keeps you aware of traffic; 27.8 g barely registers.
• Best for calls → Bluedee Headphones. cVc 8.0 noise-cancelling mics and dedicated call controls are the more serious setup.
• Best for going phone-free → kelankeke Bone Conduction Headphones. 32 GB of internal storage means no device required.
• Best for wired listening → Bluedee Headphones. The 3.5 mm jack is a real advantage when the battery dies.
In my opinion, most people searching for "music headphones" should buy Bluedee Headphones. If your goal is to actually enjoy music — deep bass, Hi-Res audio, ANC to kill the background, and a 50-hour battery that survives a week of commuting — the over-ear design simply does more for listening. I'd only steer you to the kelankeke set if you swim or train outdoors, because in that specific world it's the only one of the two that survives. Check the current price on Amazon before deciding, since both sit in very different budget tiers.
FAQ
how to make headphones music louder
Start with the source: raise the volume on both your phone and the app, and make sure no volume limiter is on. On Bluedee Headphones, the 32 ohm impedance means they'll get plenty loud from a phone, and you can also use the 3.5 mm cable with a separate amp for more headroom.
how to test stereo headphones
how to fix stereo headphones
First check the cable and jack, then confirm the source isn't set to mono. With Bluedee Headphones, a wired 3.5 mm connection is a quick way to isolate whether the problem is the headphones or the Bluetooth link; with kelankeke, a factory reset (hold the power button 10 seconds) clears most mode glitches.
how to make stereo headphones
You can't convert a mono or single-earbud set into true stereo — stereo requires two independent channels. Both of these ship as stereo: Bluedee delivers it over Bluetooth 5.2 or the 3.5 mm jack, and kelankeke delivers it over Bluetooth 6.0 or from its 32 GB MP3 storage.
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