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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 lighter, all-day open-ear headphone for running and the gym with longer battery life, choose Gelecek 6.0; if you need a headphone that survives real swimming with built-in music storage, choose RELAXYO Bone Conduction Swimming.
• Gelecek 6.0 — biggest strength: a 29-gram titanium frame with a quoted 10 hours of playtime and a 12-hour charge cycle, in a Grey-Black hook design you can bend and stuff in a bag.
• Gelecek 6.0 — biggest trade-off: the water protection is limited to splashes and sweat, so it is not a swim headphone, and it has no built-in memory for offline music.
• RELAXYO Bone Conduction Swimming — biggest strength: an IP68 rating plus 32GB of internal storage (up to roughly 7,000 songs), which lets it play music with no phone and no Bluetooth signal at all.
• RELAXYO Bone Conduction Swimming — biggest trade-off: 7 hours of music per charge and a 1.5-hour charge time, a shorter runtime window than the Gelecek, and you must remember to switch it out of Bluetooth mode before you get in the water.
• Who each is for: Gelecek 6.0 for runners, cyclists and gym-goers who want a light, flexible open-ear set; RELAXYO for swimmers and triathletes who need waterproofing and onboard storage.
The Gelecek 6.0 is built around the idea of a headphone you forget you're wearing. The titanium frame weighs just 29 grams, and the hook-shaped open-ear design leaves your ear canal completely open. That's the whole point of bone conduction: the driver sends vibration through your cheekbones instead of firing sound into a sealed ear, so traffic, footsteps and training partners stay audible while your music plays. Gelecek also claims a fully enclosed cavity that cuts sound leakage by up to 50 percent — worth knowing if you listen in a quiet office or on a shared train.
The numbers that matter for daily use are the battery pair: 10 hours of average life and a 12-hour charge time. Ten hours covers a long week of commutes or several gym sessions before you need a cable. The 12-hour charge is slow by modern standards, so the realistic routine is to plug it in overnight rather than top it up in twenty minutes. Connectivity is Bluetooth 5.4, and the earpiece uses touch controls, so playback and volume are handled with taps rather than buttons.
The IP55 rating is the honest limit here. IP55 covers sweat, light rain and dust — running, hiking and cycling all fit inside that envelope, exactly as the spec sheet suggests. Submerging it is not part of the design brief, so if lap swimming is on your schedule, this is the wrong tool. The build is Grey-Black titanium with an open-ear hook, and there's no warranty listed, which is worth factoring in if you're hard on gear.
Buy the Gelecek 6.0 if you want a very light open-ear headphone for running, cycling, gym work and commuting, and you value the longer 10-hour runtime and touch controls. Skip it if you swim, or if you want music without carrying a phone.
The RELAXYO Bone Conduction Swimming is the more specialised product, and its design decisions all point at one scenario: water. The IP68 rating is the headline — it protects against sweat and rain and is intended to be worn with a swim cap or goggles, which is a very different use case from the Gelecek's splash resistance. The spec sheet is explicit that Bluetooth cannot transmit underwater, so the intended workflow is to switch the headphone from Bluetooth mode to MP3 mode before you start your laps. That's a double-press on the power button.
That MP3 mode only works because of the 32GB of built-in storage — the equivalent of 32,768 MB, or up to about 7,000 songs. You load files by connecting the included magnetic charging cable to a computer. For a swimmer, this is the feature that makes the product make sense: no phone on the pool deck, no signal problem, just music from the headset itself. Bluetooth 5.4 is still there for dry-land use, quoted at a range of more than ten meters in barrier-free environments, so the same headphone works for running and gym sessions.
Battery is where this one asks for more discipline. It charges in 1.5 hours and delivers up to 7 hours of music, which covers a long training block but means more frequent charging than the Gelecek. Controls are three physical push buttons — power in the middle, volume up and down on the sides, handling play/pause, calls, voice assistant and mode switching. Physical buttons are genuinely easier to find by feel than touch panels, especially with wet hands. The frame is memory titanium in Violet, designed to bend and conform without pressure, and RELAXYO lists a 1-year warranty.
Buy the RELAXYO if you swim, surf or train in water and want onboard music without a phone. Skip it if you never get wet and would rather have the longer battery life and touch controls of the Gelecek.
Side-by-Side: Which Should You Choose?
• Best for battery life → Gelecek 6.0. 10 hours of average life beats the RELAXYO's 7 hours, and it's the one I'd grab for a long day out.
• Best for phone-free listening → RELAXYO. 32GB of storage and an MP3 mode mean the headphone is the music source.
• Best for running and cycling → Gelecek 6.0. At 29 grams with a flexible titanium frame and IP55, it's aimed squarely at dry-land sport.
• Best for fast charging → RELAXYO. 1.5 hours to full is a much shorter turnaround than the Gelecek's 12 hours.
• Best controls with wet or gloved hands → RELAXYO. Three push buttons beat a touch surface when your fingers are numb or wet.
• Best for a phone in your pocket at all times → Gelecek 6.0. Bluetooth 5.4, touch control and a lighter frame suit everyday wear.
• Best value for a single-sport swimmer → RELAXYO, because the IP68 rating and 32GB of storage are the two things you can't add later.
In my opinion, the RELAXYO Bone Conduction Swimming is the one I'd buy, and the reason is narrow but decisive: it does something the Gelecek physically cannot. IP68 waterproofing plus 32GB of onboard music means you can swim laps with no phone, no signal and no compromise — and it still works as a normal Bluetooth 5.4 headphone on land.
That said, if you never swim, I'd take the Gelecek 6.0 instead. It's lighter at 29 grams, it lasts 10 hours instead of 7, and it uses touch controls. The IP55 rating is plenty for sweat and rain. Pick the RELAXYO for water, the Gelecek for everything above it — and check the current price on Amazon before you commit.
how to bone conduction headphones work
They use a bone conduction driver that sends vibration through your cheekbones to your inner ear instead of pushing sound into a sealed ear canal. That's why both of these are open-ear designs — you hear your music and your surroundings at the same time. The Gelecek 6.0 also claims a fully enclosed cavity that reduces sound leakage by up to 50 percent.
how to wear bone conduction headphones
The hook-shaped earpiece rests on the outside of your ear and the transducer sits against the bone in front of your ear, not inside the canal. The RELAXYO's memory titanium frame is designed to bend and conform without pressure, and its spec sheet notes it can be worn with a swim cap or goggles. The Gelecek's 29-gram titanium frame is meant to be flexible enough to stretch and bend without deforming.
how to use bone conduction headphones
Pair over Bluetooth 5.4 for normal listening, then control playback from the headset — touch on the Gelecek 6.0, three push buttons on the RELAXYO. For swimming, the RELAXYO must be switched to MP3 mode with a double-press of the power button, because Bluetooth can't transmit underwater. You load songs into its 32GB of storage through the magnetic charging cable connected to a computer.
how many songs can 32GB hold
RELAXYO states 32GB (32,768 MB) is equivalent to roughly 7,000 songs, assuming typical compressed audio files. That's far more than most people need for training sessions, so the practical limit is your playlist, not the storage. The Gelecek 6.0 has no built-in storage, so it always needs a connected Bluetooth device as the music source.
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