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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-26 · 7 min read · Independent comparison
If you want a single open-ear hook you can rotate into the exact angle your ear wants, choose Heayzoki Single Ear Hanging; if you need a full pair of wrap around earbuds with a charging case, long battery life and a waterproof rating, choose Rolosar Earbuds.
• Heayzoki's biggest strength: one ear, one hook, and a double-rotation alloy shaft that lets you dial in the fit angle yourself — plus DSP noise reduction on calls.
• Rolosar's biggest strength: a complete sport package — Bluetooth 5.4, 14.2mm drivers, IP7 waterproofing, ear hooks, three ear tip sizes and a case that stretches playtime to about 50 hours.
• Rolosar's biggest trade-off: it is a two-ear in-ear design, so it blocks your ear canal and you cannot share one bud with the outside world the way an open-ear hook allows.
• Buy Heayzoki if you take a lot of calls and want one ear free, worn with glasses, for hours at a time.
• Buy Rolosar if you want wrap around earbuds for running, gym sessions and music, and you want them to survive sweat and rain.
This is a one-ear headphone built around a hook, not a bud you shove into your canal. The ear placement is listed as open ear with an angled ear hook or wing shape, and the support point is made from elastic soft rubber. That combination matters more than it sounds: the weight of the headphone gets spread across the hook instead of pressing on one spot, which is the difference between something you forget about and something you keep adjusting.
The second thing that stands out in the specs is the joint. Heayzoki uses an imported alloy shaft with double rotation, so you can swing the earpiece and the hook independently to match your own ear. The data sheet specifically notes that wearing glasses will not affect it, which is a real pain point for anyone whose frames already fight with an over-ear hook. The enclosure mixes ABS with rubber, and the whole thing weighs 98 g as a package.
On the audio and call side, you get a 13mm dynamic driver with a 20Hz–20kHz frequency range, tuned — per the manufacturer's description — to lift bass dynamics and make call vocals louder and clearer. Bluetooth 5.0 handles the connection with a stated 10 m range and support for A2DP, AVRCP, HFP and HSP. The microphone uses DSP with a software noise-reduction algorithm to filter background noise on calls. There is a 170mAh built-in lithium battery and a charging cable in the box, and controls run through media control on the remote.
Rolosar Earbuds: Who It's For
Rolosar goes the opposite direction: a matched pair of wrap around earbuds with ear hooks, designed to stay put while you move. The earpiece shape is in-ear, the enclosure is a soft and flexible material, and the package includes three ear tip sizes so you can actually size the seal to your own canal instead of accepting whatever comes in the box.
The spec list is where this one earns its keep for athletes. Bluetooth 5.4 is the newest version in this comparison, with the manufacturer claiming roughly double the transfer speed of 5.3, more stable transmission, lower power consumption and low latency. The stated Bluetooth range is 9.14 m, and it auto-connects to the last paired device when you open the case lid. Codec-level compatibility covers iOS, Android, tablets, laptops and TVs.
Sound comes from 14.2mm double-layer diaphragm drivers with a 20Hz–20,000Hz range, described as strong bass with clear mids and bright treble. Noise control is listed as active noise cancellation, and the built-in microphones use ENC to keep your voice clear on calls. Battery life is about 10 hours per charge, and the charging case extends total use to roughly 50 hours over multiple recharges through a Type-C port. There is also a dual LED display under a transparent case cover showing remaining case battery and bud charging status.
Two more practical details: an IP7 waterproof rating that resists sweat, rain and splashes, and smart touch controls on the upper surface of each bud for play/pause, track skipping, volume, calls and voice assistant. Unpairing is done by tapping both buds five times together.
Side-by-Side: Which Should You Choose?
• Best for one-ear, open listening → Heayzoki Single Ear Hanging. Open-ear placement keeps your other ear free for the world around you.
• Best for battery life → Rolosar Earbuds. About 10 hours per charge and roughly 50 hours total with the case, versus a single 170mAh cell in the Heayzoki.
• Best for sweat and rain → Rolosar Earbuds. IP7 waterproofing is in the specs; the Heayzoki sheet lists no water resistance at all.
• Best for glasses wearers → Heayzoki Single Ear Hanging. The double-rotation alloy shaft is explicitly designed so glasses do not interfere with the hook.
• Best for stereo music → Rolosar Earbuds. Two 14.2mm dynamic drivers with a 20Hz–20kHz range beat a single 13mm driver for music, by simple geometry.
• Best for call clarity in noisy places → a tie, leaning Heayzoki for single-ear work. Heayzoki uses DSP plus a software noise-reduction algorithm; Rolosar uses ENC mics and ANC. Different routes to the same goal.
• Best for the newest wireless tech → Rolosar Earbuds. Bluetooth 5.4 with auto-connect against Bluetooth 5.0 on the Heayzoki.
• Best for fit customization → both, for different reasons. Heayzoki adjusts by angle; Rolosar adjusts by ear tip size (S/M/L) and flexible hooks.
In my opinion, the Rolosar Earbuds are the better buy for most people, because they cover more ground: Bluetooth 5.4, a bigger driver, IP7 waterproofing, three tip sizes, ANC, touch controls and a case that takes you to about 50 hours. That is a whole system rather than a single device. I would still pick the Heayzoki Single Ear Hanging without hesitation if my day is calls, not music, and I need one ear open — the rotating hook and glasses-friendly design solve a problem the Rolosar pair simply cannot. Buy the Rolosar for training and listening; buy the Heayzoki for talking.
how to wear wrap around earbuds
Loop the hook over the top of your ear first, then let the earpiece settle against or into your ear canal. On the Rolosar, choose the ear tip size that seals without pressure; on the Heayzoki, rotate the double-jointed shaft until the open-ear piece sits comfortably.
how to use wrap around earbuds
Pair them over Bluetooth, then use the on-board controls — the Rolosar has touch controls on the upper surface of each bud for play, track, volume and calls, while the Heayzoki routes media control through its remote. The Rolosar also auto-connects to your last paired device when you open the case.
how to wrap string around earbuds
Neither product needs string or a wrap for storage — the Rolosar buds go back into their charging case, and the Heayzoki comes with an ear cap and a charging data cable. Winding a cord around either one risks stressing the hook or the charging contact.
are wrap around earbuds good for running
Yes, if they are designed for it. The Rolosar pair is explicitly built for sport with flexible ear hooks, three ear tip sizes and an IP7 waterproof rating for sweat and rain. The Heayzoki is aimed at calls and light sports use, and its spec sheet lists no waterproof rating.
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