If you want over-ear headphones with active noise cancellation and long playback for kids bluetooth, choose TREBLAB Z2; if you need open-ear headphones for swimming, choose kelankeke Bone Conduction Headphones. The deciding difference is straightforward: TREBLAB is built around cushioned, isolating everyday listening, while kelankeke pairs an open-ear fit with waterproofing and built-in music storage for use in the water.
• TREBLAB Z2’s biggest strength: over-ear design, active noise cancellation, and up to 58 hours of playback. Trade-off: it is not designed for swimming.
• kelankeke’s biggest strength: IPX8 waterproofing and 32GB of onboard storage for swimming with Bluetooth switched off. Trade-off: up to 10 hours of playback, far less than the Z2’s stated maximum.
• TREBLAB Z2 suits listeners who want over-ear coverage, long battery life, and a 3.5 mm jack.
• kelankeke Bone Conduction Headphones suits swimmers and active listeners who want an open-ear design and MP3 playback without a phone connection.
• For kids bluetooth, consider the listening environment and fit first: one model covers the ears, while the other leaves them open.
The TREBLAB Z2 is the more conventional over-ear choice. Its oval earcups cover the ears, and active noise cancellation is built in. That makes its design a better fit for someone who wants to reduce outside noise while listening at home, during a commute, or in a shared space. The 40 mm dynamic drivers, Bluetooth 5.3, and 3.5 mm headphone jack give it both wireless and wired listening options.
Its stated playback time is up to 58 hours, and charging takes about three hours. That longer battery figure gives the Z2 an advantage for extended listening between charges. It also has a 65 ms audio-latency figure, a 33-foot Bluetooth range, and a foldable design with a carrying case. IPX4 sweat resistance is useful for ordinary sweat or light splashes, but it is not a substitute for swimming-rated waterproofing.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-23 · 6 min read · Independent comparison
The kelankeke model takes a different approach: it is open-ear, lightweight, and designed for activities where a sealed over-ear fit would be inconvenient. Its IPX8 waterproof rating and included MP3 mode make it the clear swimming-oriented option here. Bluetooth does not work underwater, so swimmers need to switch to MP3 mode and use the built-in 32GB storage rather than stream from a phone.
Away from the water, it supports Bluetooth 6.0 with a stated range of up to 33 feet. The maker describes compatibility with iOS and Android devices and use for music, audiobooks, and calls. Its playback time is up to 10 hours, and magnetic charging takes about two hours. Physical buttons handle playback, track changes, calls, and switching between Bluetooth and MP3 modes.
This is the model I’d consider for someone who swims, runs, cycles, or exercises and wants an open-ear design. It is not the natural pick for listeners seeking active noise cancellation or long playback between charges: its noise control is listed as passive, and its maximum battery claim is substantially shorter than the Z2’s. For kids, the open-ear design may help preserve awareness of the surroundings, but the listed age range is adult, so the specs do not establish that it will fit a child comfortably.
• Best for longer stated playback → TREBLAB Z2. It is rated for up to 58 hours, compared with up to 10 hours for kelankeke.
• Best for swimming → kelankeke Bone Conduction Headphones. It has an IPX8 waterproof rating and an MP3 mode for underwater listening; Bluetooth is not supported underwater.
• Best for active noise cancellation → TREBLAB Z2. Its noise-control feature is listed as active noise cancellation. Kelankeke lists passive noise cancellation.
• Best for open-ear awareness during exercise → kelankeke. Its open-ear design is intended to let the wearer remain more aware of surrounding sounds than with over-ear coverage.
• Best for a wired listening option → TREBLAB Z2. It has a 3.5 mm jack as well as Bluetooth.
• Best for listening to stored music without a phone nearby → kelankeke. Its 32GB memory supports MP3 mode, including when Bluetooth cannot connect underwater.
• Best for shorter charging time → kelankeke. Its stated charge time is two hours, versus about three hours for the Z2.
• Best for kids bluetooth in a quiet indoor setting → TREBLAB Z2, with adult guidance. Its over-ear design and long playback may suit home listening, but the listed specs do not give a child-specific fit or volume limit.
If you are searching for “under 200 wireless headphones,” the useful comparison here is not a price claim. These are different designs for different situations: the Z2 emphasizes over-ear listening and battery life, while kelankeke emphasizes waterproof use and offline playback. Check the current price on Amazon if that is part of your decision.
My Verdict
I would choose the TREBLAB Z2 for everyday over-ear listening because its stated 58-hour playback, active noise cancellation, and wired jack make it the more versatile home-and-travel option. For kids bluetooth, I’d choose it only when the child’s needs suit an over-ear design and an adult can guide listening. If swimming is the priority, I’d pick kelankeke instead: its waterproofing and built-in MP3 mode address that use case directly.
No. Bluetooth is not supported underwater. Switch to MP3 mode and use music stored on the headphones’ 32GB memory for swimming.
The TREBLAB Z2 is listed for up to 58 hours of playback, while kelankeke is listed for up to 10 hours. Actual listening time can vary with use and settings.
Kelankeke’s open-ear design is aimed at active use and can help the wearer stay aware of nearby sounds. The Z2 is an over-ear design with active noise cancellation, so it is less suited to situations where awareness is important.
The available product details do not identify memory foam ear cushions on the Z2, and kelankeke is described as open-ear rather than as having cushioned earcups. If you specifically want memory foam for meetings, neither set of supplied specifications confirms that feature.
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