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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want bone conduction headphones built for night cycling and long outdoor sessions, choose KLKE Open-Ear Bone Conduction; if you need a rugged protective case for bone conduction headphones you already own, choose casmilee Bone Conduction Headphone.
• KLKE Open-Ear Bone Conduction — biggest strength: It's the actual audio product here, with a rear safety light, dual sound modes, 10-hour playtime and an IP66 sweatproof rating built for cycling, hiking and running.
• KLKE Open-Ear Bone Conduction — biggest trade-off: No noise control at all, so it's the wrong pick if you want to block out the world — that's the point of open-ear, but it's a real limitation indoors.
• casmilee Bone Conduction Headphone — biggest strength: A hard-shell storage case in 1680D Oxford nylon with shock-absorbing EVA foam, a soft anti-scratch lining and a military-grade carabiner, with a two-year warranty.
• casmilee Bone Conduction Headphone — biggest trade-off: It contains no electronics. It does not play audio, so it only makes sense if you already own a pair of bone conduction headphones.
• Who each pick is for: Buy KLKE if you need the headphones themselves. Buy casmilee if you need to protect and carry headphones you already have.
KLKE Open-Ear Bone Conduction is a pair of open-ear headphones that use a bone conduction driver rather than an in-ear design. The stated appeal is the same as any bone conduction set: nothing sits inside your ear canal, so your ears stay open to traffic, voices and ambient sound. For runners and cyclists, that awareness is the whole reason to pick this category over standard earbuds.
What sets this model apart in the specs is the outdoor-specific kit. There's a rear safety warning light — a bright orange light on the back of the headband — intended to improve your visibility on night runs, evening rides, hikes or dog walks. There's also dual mode switching: an Indoor Mode tuned for balanced clarity and an Outdoor Mode that pushes more bass power, switched with a single button. The All-in-one Transducer Design is KLKE's term for the driver structure, and the company ties it to deeper low-frequency response, which matters because bass is traditionally the weak spot of bone conduction audio.
On the practical side, you get Bluetooth 5 with a 10-meter range, push-button controls, a three-hour charge time and up to 10 hours of playtime. The build is rated IP66 for sweat and water resistance, which covers sweat-heavy training and rain, though I wouldn't treat it as swim gear. It's a single-item package in white, sized for adults, with a one-year warranty.
Buy it if you want one device that handles calls via the built-in mic, survives sweat, stays visible after dark and keeps your ears open on the road. Skip it if you want active noise cancellation — this model has none — or if you mainly listen in loud, enclosed spaces where open-ear designs simply can't compete. And if you already own bone conduction headphones and just need somewhere to put them, this isn't that product.
Despite the name, casmilee Bone Conduction Headphone is not a headphone. It's a hard storage case designed for bone conduction headphones — specifically listed as fitting SHOKZ OpenRun Pro, OpenMove and OpenSwim Pro, and compatible with models from Raycon, CPTEA, CXK and TOZO, among other open-ear and wireless bone conduction sets. If you read the title fast, that's the one thing worth getting straight before you buy.
The case itself is well thought out for active people. The shell is 1680D Oxford nylon with shock-absorbing EVA foam, which is the combination you want against drops, moisture, dust and scratches rattling around in a gym bag. Inside, a soft anti-scratch lining protects the headband, while elastic dividers and mesh pockets keep charging cables, ear hooks and small parts separated instead of tangled. A 360-degree carabiner clips the whole thing to a backpack or bike rack, and a 3M reflective logo on the outside adds a visibility cue for night runs.
The color is green, with gradient styling that casmilee positions as a look-at-me design choice. It's a single case, not a bundle, and it carries a two-year warranty — longer coverage than the electronics it's meant to hold, which is a fair reflection of how simple the product is.
Buy it if you already own bone conduction headphones, want them protected in transit, and like the idea of clipping them to a pack or bike frame. Skip it if you're shopping for audio gear — this will not play a single note, and it won't help you if your headphones are a shape that doesn't fit the listed models.
Side-by-Side: Which Should You Choose?
• Best for night visibility → KLKE Open-Ear Bone Conduction. The built-in rear safety light is part of the headset itself, not an accessory.
• Best for protecting gear you own → casmilee Bone Conduction Headphone. Hard shell, EVA foam, anti-scratch lining, carabiner.
• Best for long sessions → KLKE Open-Ear Bone Conduction. Up to 10 hours of playtime on a three-hour charge.
• Best for sweat and rain → KLKE Open-Ear Bone Conduction. IP66 rating on the headset; the case is water-resistant by material, not rated.
• Best for commuting and calls → KLKE Open-Ear Bone Conduction. Bluetooth 5, 10-meter range and a precision mic aimed at voice clarity.
• Best for travel and storage → casmilee Bone Conduction Headphone. Internal mesh pockets and elastic straps keep cables and hooks organized.
• Best for warranty length → casmilee Bone Conduction Headphone. Two years versus one year on the KLKE headset.
• Best for quiet listening → neither. KLKE has no noise control, and the case makes no sound at all.
In my opinion, if you're choosing between these two as your next purchase, buy KLKE Open-Ear Bone Conduction. It's the only one that does the job people searching this comparison actually want done: play audio, take calls, survive sweat and keep you visible after dark. The casmilee case is a genuinely good accessory — the Oxford nylon shell, EVA foam and carabiner are the right materials for the job — but it's a complement to bone conduction headphones, not a substitute for them. Buy the casmilee case only as a second purchase, once you already own a compatible set. If you're weighing value, check the current price on Amazon before deciding, since only you know what each is worth for your setup.
No. It's a hard storage case for bone conduction headphones, listed as compatible with SHOKZ OpenRun Pro, OpenMove and OpenSwim Pro, plus models from Raycon, CPTEA, CXK and TOZO. It has no drivers, no Bluetooth and no battery.
The KLKE headset has no noise control feature, by design. Open-ear headphones let ambient sound in so you stay aware of traffic and surroundings — that's a safety feature for cycling and running, not a defect.
It's rated IP66 for sweat and water resistance, so sweat-heavy workouts and rain are within its intended use. It is not a swimming product. The casmilee case, by contrast, is built from water-resistant materials but isn't given a water-resistance rating.
Buy KLKE Open-Ear Bone Conduction first. Headphones without a case still work; a case without headphones is an empty box. Add the casmilee case later if you want to protect your set in a bag or on a bike.
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