We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-27 · 6 min read · Independent comparison
If you want the bigger, bassier sound and the longer single-charge listening window, choose MOOR Black OpenWave Open; if you need the lightest possible clip-on fit that plays nicely with glasses and small ears, choose Kinglucky i21.
• MOOR Black OpenWave Open — biggest strength: large 16.2mm dynamic drivers in a true open-ear design, backed by 4 mics with ENC noise cancelling and up to 40 hours total playback.
• MOOR Black OpenWave Open — biggest trade-off: each earbud weighs 12.7g, so it's noticeably more material on your ear than a clip-on, and it uses touch controls, which some people find fussy.
• Kinglucky i21 — biggest strength: a featherweight 4.7g clip-on build with an angled ear-hook shape, explicitly aimed at small ears and glasses wearers, with up to 45 hours total and 90 hours standby.
• Kinglucky i21 — biggest trade-off: shorter per-charge playtime at 6 hours, button-style controls, and no ENC call-noise cancellation listed.
• Who each is for: MOOR Black OpenWave Open for listeners who prioritize sound size, call clarity and long single sessions; Kinglucky i21 for minimal-wear comfort, glasses compatibility and all-day portability.
The MOOR Black OpenWave Open is the more "audio-first" of these two. The headline spec is the pair of 16.2mm dynamic drivers — noticeably larger than the 6–13mm drivers common in typical in-ear buds. In practice, that's the design decision you feel most: more surface area pushing air usually translates to fuller bass and a more open midrange, which is exactly what the brand claims and why it points electronic, hip-hop and rock listeners toward it. If your listening leans on beat-driven, bass-forward music, this is the more natural pick.
The second thing that stands out is the fit philosophy. These rest on top of the ear rather than plugging the canal — true open-ear — and the silicone enclosure plus curved shape is meant to keep them stable without jamming anything into your ear. The payoff is twofold: no in-ear pressure over long sessions, and you stay aware of your surroundings. That second point matters more than people expect. Four microphones with ENC noise cancelling handle your voice on calls while the open design still lets approaching traffic, a bike bell or a colleague's voice through. For runners, cyclists, hikers and anyone working out in public, that's a genuine safety argument, not a marketing one.
Kinglucky i21: Who It's For
The Kinglucky i21 goes the other direction: it's built around being barely there. At 4.7g per earbud, it's roughly a third of the weight of the MOOR pair, and the clip-on, angled ear-hook shape sits outside the ear rather than on top of it. That combination is aimed squarely at two groups the listing names directly — people with small ears and people who wear glasses. If standard earbuds feel like they're fighting your frames or sliding around, a clip-on that anchors to the ear's outer curve is a meaningfully different experience, and it's the strongest reason to pick this one.
Battery is the other half of the story, and it's a bit of a split verdict. Per charge you get 6 hours, which is shorter than the MOOR's 10–11. But the charging case pushes total playback to 45 hours, with 90 hours of standby, and the case itself recharges in about 1.5 hours (buds in 2). So the pattern is: shorter bursts, bigger reserves. For commuters, gym sessions and short errands, 6 hours covers almost any single outing — you just plug back into the case more often than you would with the MOOR.
On the spec sheet, this is the leaner product. Bluetooth 5.3 and a 10-meter range match the MOOR. IPX4 with a nano hydrophobic coating covers rain and sweat. But it lists no ENC or active call-noise cancellation, and its noise control field is simply "None," so calls in windy or busy places won't get the same voice-isolation treatment. Controls are button/touch rather than pure touch. Choose the i21 if fit and weight are your top priority; look elsewhere if call clarity in loud environments is the deciding factor.
• Best for sound size and bass → MOOR Black OpenWave Open. 16.2mm dynamic drivers versus the smaller-driver norm.
• Best for the lightest possible wear → Kinglucky i21. 4.7g per bud against 12.7g.
• Best for glasses wearers and small ears → Kinglucky i21. The clip-on, angled-hook design is purpose-built for it.
• Best for calls in noisy places → MOOR Black OpenWave Open. 4 mics plus ENC noise cancelling, versus no listed call noise cancellation.
• Best for long single sessions → MOOR Black OpenWave Open. 10–11 hours per charge beats 6 hours.
• Best for total reserve time → Kinglucky i21. Up to 45 hours with the case and 90 hours standby, versus 40 hours total.
• Best for workout and outdoor safety → MOOR Black OpenWave Open. Open-ear placement keeps you aware of traffic; IPX4 covers sweat and splashes.
• Best for simple, no-fuss controls → Kinglucky i21. Button/touch control instead of pure touch, if you dislike tap gestures.
If I were buying for myself and music quality plus call clarity were the point, I'd take the MOOR Black OpenWave Open. The 16.2mm drivers, 4-mic ENC setup and 10–11 hour per-charge runtime make it the more capable listening tool, and the open-ear safety angle is a real bonus for anyone who runs or cycles outdoors. I'd only switch to the Kinglucky i21 if weight and fit were my dealbreakers — and for glasses wearers or anyone with small ears, that's a perfectly good reason. It's the more comfortable, more forgettable-to-wear option, and its 45-hour case total is genuinely useful. In my opinion, the MOOR is the better all-rounder; the i21 is the better fit specialist.
Both are IPX4 and both stay put by design, so either works. The MOOR adds 4-mic ENC for calls and keeps you aware of traffic via its open-ear placement, which I'd lean toward for road running.
Per charge, the MOOR wins at 10–11 hours versus 6. Over a full case cycle it flips: the Kinglucky i21 reaches up to 45 hours total with 90 hours standby, versus 40 hours for the MOOR.
Yes — that's one of their stated design targets. The 4.7g clip-on shape anchors to the outer ear instead of sitting on top of it, so it's less likely to clash with frames than a heavier open-ear bud.
I can't quote prices here, and the right call depends on what's current. Check the latest price on Amazon for both and compare them against the specs above — if you need call clarity and bass, the MOOR earns its place; if you need light, glasses-friendly fit, the i21 does.
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See also: EPOS Impact 1061T vs NUROUM OpenEar Pro, rockpapa L22 vs Owliwise Kids, MAcnas Clip-on Earbuds Open vs MORWLAT Heart Decor, BEVCEFCC Open Ear True vs kurdene Open Ear Buds