How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want maximum battery life, over-ear comfort and hybrid ANC that quiets engine hum and air conditioning, choose FIO MOTUS Hybrid Active Noise; if you need pocket-sized earbuds with a 45dB ANC rating, a transparency mode for street awareness and IPX7 water resistance, choose Thunelec Earbuds.
• FIO MOTUS Hybrid Active Noise — biggest strength: Hybrid ANC with four microphones plus a 130-hour standard-mode battery, so it's built for long sessions and low-frequency drone.
• FIO MOTUS Hybrid Active Noise — biggest trade-off: It's a full over-ear headphone at 9.44 ounces, so it's not something you'll tuck into a jeans pocket, and it isn't water-rated like the Thunelec pair.
• Thunelec Earbuds — biggest strength: A transparency mode for hearing your surroundings, 45dB ANC, IPX7 waterproofing and a full-color touch-screen case you can control without your phone.
• Thunelec Earbuds — biggest trade-off: Rated 6 hours per charge (48 hours with the case), which is a fraction of the FIO MOTUS runtime, and there's no wired fallback jack.
• Who each pick is for: FIO MOTUS for home-office, flights and movie watching where you want big sound and huge battery; Thunelec for commuting, gym sessions and calls where you want compact, water-resistant earbuds with awareness mode.
The FM20 is a classic over-ear design, and the spec sheet tells you why it exists: hybrid active noise cancellation with four built-in microphones aimed at low and mid-frequency noise — the engine hum of a plane, a droning HVAC unit, the rumble of a bus. That's the noise profile hybrid ANC handles best, and it's the profile that ruins focus in a home office.
The audio side is where the numbers get interesting. Oversized 40mm dynamic drivers, a frequency range that stretches from 20Hz all the way to 40,000Hz, and 16-ohm impedance — low impedance like that usually means easy, loud playback from a phone or laptop without a headphone amp. Add personalized spatial audio, which uses built-in algorithms to keep you centered in the sound for music and movies, and you've got a headphone that leans cinematic rather than clinical. Bluetooth 5.3 covers the wireless side with a 10-meter range, and dual connection plus a 3.5mm jack means you can go wired when you want zero latency — useful for editing or gaming. The listed audio latency is 38 milliseconds, which is fine for video but worth knowing if you're sensitive to sync.
Then there's the battery, and it's the headline. Up to 75 hours in noise-cancelling mode, up to 130 hours in standard mode, and a 10-minute charge that returns 12 hours of listening. If you hate charging rituals, this is the spec that matters. Comfort is addressed with protein-leather earcups and earcups that auto-adjust angle to different head shapes.
Thunelec Earbuds: Who It's For
The Thunelec pair takes the opposite approach: small, sealed, in-ear, and loaded with features that only make sense in a compact format. The ANC is rated up to 45dB, blocking roughly 90% of distractions like blower noise, traffic and office chatter, and the ENC side is tuned for your voice on calls — suppressing static so the person on the other end doesn't hear you muffled or cut out.
The transparency mode is the feature worth slowing down on. Because these are in-ear buds that seal your canal, you lose natural awareness of what's around you. Transparency mode pipes the outside world back in through the drivers so you can hear traffic, a colleague, or an announcement while your audio keeps playing. If you walk city streets or bike-adjacent commutes, that single feature can matter more than the ANC rating. It's the reason the Thunelec pair is the better pick for anyone whose listening happens while moving through the world.
Battery is 6 hours per charge and 48 hours total with the case, with a 1.5-hour full charge and an on-case indicator showing real-time battery level. The case itself is the party trick: a full-color touch screen for playback, track skipping, calls, noise-cancelling modes, brightness, wallpaper, a timer, a headphone finder and 7-language switching — no phone app required. One honest caveat from the spec sheet: the earbuds don't do direct volume control, so you adjust volume on the case screen or the connected device.
Audio runs through 14.2mm bio-carbon fiber dynamic coils with bass down to 50Hz and five EQ modes (standard, classic, jazz, rock, pop). Bluetooth 5.4 handles pairing across iOS, Android, tablets, laptops and smart TVs, and IPX7 waterproofing shrugs off sweat, rain and splashes. The fit comes with three silicone tip sizes, and Thunelec backs it with a 30-day refund window and a 2-year warranty.
Who should buy it: commuters, gym users, runners in light rain, call-heavy workers and anyone who wants control on the case instead of in an app. Who should skip it: people who want marathon battery life, a wired option, or over-ear isolation for long desk sessions.
• Best for battery life → FIO MOTUS Hybrid Active Noise. 130 hours standard, 75 with ANC on, versus 6 hours per charge and 48 total on the Thunelec.
• Best for transparency mode and street awareness → Thunelec Earbuds. It's the only one of the two with a listed transparency mode.
• Best for flights and home-office focus → FIO MOTUS Hybrid Active Noise. Hybrid ANC with four mics targets the low-frequency drone that actually breaks concentration.
• Best for workouts and rain → Thunelec Earbuds. IPX7 waterproofing and a snug three-tip in-ear fit beat an over-ear headphone for sweat and weather.
• Best for calls in noisy places → Thunelec Earbuds. The ENC voice-clarity tuning is aimed squarely at call quality.
• Best for movies and spatial immersion → FIO MOTUS Hybrid Active Noise. Personalized spatial audio plus 40mm drivers and a 40kHz ceiling point to a wider, more cinematic presentation.
• Best for wired, zero-latency use → FIO MOTUS Hybrid Active Noise. It has a 3.5mm jack; the Thunelec pair is wireless only.
• Best for on-device control without your phone → Thunelec Earbuds. That full-color touch-screen case is genuinely unusual.
In my opinion, the right answer depends on where you listen, not which one is "better." If you want one purchase that covers long workdays, travel and movie nights with the least charging anxiety, I'd buy the FIO MOTUS Hybrid Active Noise — the 130-hour standard mode, 75-hour ANC mode, hybrid four-mic cancellation, spatial audio and 3.5mm fallback make it the more versatile long-session tool. If your listening happens on the move and you specifically want transparency mode so you can hear traffic and coworkers, I'd buy the Thunelec Earbuds instead: 45dB ANC, IPX7, 5 EQ modes and a touch-screen case is a lot of everyday utility in a pocketable shape. Check the current price on Amazon before you commit, since budget is the tiebreaker neither spec sheet can settle for you.
FAQ
what is transparency mode in headphones
what's transparency mode headphones
It's the same feature under a slightly different name: an ambient-awareness setting that blends the real world into your audio instead of blocking it. You'd use it while walking, ordering coffee or crossing a street, then switch back to ANC when you want quiet. Of these two, only the Thunelec Earbuds list transparency mode — the FIO MOTUS FM20 is ANC-focused.
how to turn off transparency mode headphones
On most models you cycle through the noise-control modes using an on-ear control or the companion app, and transparency sits alongside ANC and "off." The Thunelec Earbuds put noise-cancelling control on the touchscreen charging case and on the buds themselves, so you can tap out of transparency and back into ANC without touching your phone.
The FM20's listed noise-control options are active and hybrid active noise cancellation; no transparency mode appears in its specifications. So if hearing your surroundings while you listen is a must-have, the Thunelec Earbuds are the safer pick. If you mainly want noise blocked out for long stretches, the FIO MOTUS fits that job better.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: TOZO Hybrid Active Noise vs 1Mii NightPair TX Auracast, Wuopzf USB C vs TECKNET Hybrid Active Noise, jechan Call Noise Cancelling vs Generic Earbuds Active Noise