We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-02 · 6 min read · Independent comparison
If you want a feature-rich everyday earbud with app-tuned sound, deep water protection and a charging case that shows you exactly how much power is left, choose TOZO T21; if you need an open-ear clip design that keeps you aware of traffic and surroundings while you run or ride, choose TANFESO Open Ear Clip.
Both put an LED digital display on the case, which is the whole reason these two get compared. Beyond that screen, they solve very different problems.
• TOZO T21's biggest strength: a full ecosystem — 32 EQ presets through the TOZO app, 14.2mm dynamic drivers, dual-mic call noise cancelling, IPX8 waterproofing, wireless charging, and an LED display showing each earbud plus the case.
• TOZO T21's biggest trade-off: it's a semi-in-ear bud that seals into the ear canal, so it blocks outside sound — great for focus, wrong if you need to hear what's around you.
• TANFESO Open Ear Clip's biggest strength: a bone conduction clip-on design at 0.18 oz that never enters your ear canal, plus Bluetooth 5.4 and a 33-foot range.
• TANFESO Open Ear Clip's biggest trade-off: it has no app, no EQ customization, no stated playback figures, and a short two-month warranty.
• Who TOZO T21 is for: commuters, gym-goers and anyone who wants rich, adjustable sound and long battery life.
• Who TANFESO Open Ear Clip is for: outdoor runners, cyclists and glasses-wearers who put safety and comfort first.
The T21 is the more complete product of the two on paper. Inside each bud sits a 14.2mm dynamic driver covering a 20Hz–20kHz range at 32 ohm impedance, which is the kind of hardware you associate with full, roomy sound rather than thin, tinny output. Pairing is Bluetooth 5.3, and the earbuds auto-reconnect the moment you open the case — a small thing that matters every single day.
The battery story is where the LED display earns its place. TOZO lists up to 10 hours per earbud from the 45mAh cells and roughly 44 hours total with the 500mAh case, with a full recharge in about 2 hours. The integrated display shows the level of each earbud and the case separately, so you're never guessing which part needs the cable. You can top it up wirelessly or with the included USB-A to USB-C cable.
Buy it if you want adjustable sound, serious battery life and total water confidence in one package. Skip it if you need to stay fully aware of your environment — the semi-in-ear fit seals your canal, and that's the trade-off you're accepting.
TANFESO Open Ear Clip: Who It's For
The TANFESO M100 goes the opposite direction. It's a clip-on, open-ear design built around a bone conduction driver, meaning nothing enters your ear canal. The result is a pressure-free fit and, more importantly, situational awareness: you hear approaching cars, other runners and ambient noise while your audio plays. For outdoor exercise, that's not a gimmick — it's the reason to buy this instead of a sealed bud.
At 0.18 oz with soft silicone ear hooks and an ergonomic wrap design, the M100 is built to stay put through running, dancing, and even while wearing glasses. Bluetooth 5.4 is the newest version here, with a stated 33-foot range and auto on-and-connect when you lift them from the case.
The case carries an LED digital display and the earbuds use touch controls, including an intelligent touch screen for music and calls, with a microphone tuned to pick up your voice while cutting background noise. IPX7 waterproofing covers sweat and rain. One caveat worth weighing: the warranty is listed as two months, and there's no companion app, no EQ customization and no published playback hours — so you're buying simplicity and fit rather than tweakability.
Buy it if you run, cycle or lift outdoors and want your ears open. Skip it if you want deep bass isolation, app-level tuning, or long single-charge listening figures you can plan around.
Side-by-Side: Which Should You Choose?
• Best for battery life → TOZO T21. Up to 10 hours per bud and roughly 44 hours with the case beats anything the M100 publishes.
• Best for sound customization → TOZO T21. 32 EQ presets, white noise and personal tuning through the app; the M100 has none.
• Best for all-day comfort with glasses → TANFESO Open Ear Clip. 0.18 oz and silicone hooks are designed to coexist with eyewear.
• Best for water exposure → TOZO T21. IPX8 outranks the M100's IPX7, and the sealed-cavity build is the more protective design.
• Best for call clarity in noisy places → TOZO T21. Dual-mic call noise cancelling is a named feature; the M100 only states noise reduction generally.
• Best for the newest Bluetooth → TANFESO Open Ear Clip. Bluetooth 5.4 versus 5.3, with a stated 33-foot range.
• Best for charging convenience → TOZO T21. Wireless charging plus USB-C, with an LED display for each earbud and the case.
I'd buy the TOZO T21. The reason is simple: it gives you more of everything that's measurable — longer playback, IPX8 protection, app-based EQ, wireless charging and a display that tracks each component's battery separately. In my opinion, that's the stronger everyday earbud for commuting, working out indoors and taking calls.
The TANFESO Open Ear Clip wins on one thing that no spec sheet can oversell: keeping your ears open. If you run or ride near traffic, that awareness matters more than any EQ preset, and I'd pick it without hesitation for that specific job. For everyone else, the T21 is my recommendation.
are earbuds considered electronics
Yes. Both the TOZO T21 and the TANFESO Open Ear Clip are battery-powered Bluetooth audio devices with charging cases, touch controls and internal drivers — consumer electronics in the standard sense. That also means the usual care applies: charge them properly and keep the contacts clean.
can you connect earbuds to a tv
Only if your TV supports Bluetooth audio output or you use a Bluetooth transmitter. The TOZO T21 uses Bluetooth 5.3 and the TANFESO M100 uses Bluetooth 5.4, and both pair with iOS, Android and Windows devices. TOZO explicitly lists low latency as a benefit, which helps with video, though neither sheet mentions a dedicated TV mode.
should i get black or white earbuds
It's purely cosmetic here, and the two options differ anyway: the TOZO T21 comes in light green with a black case, while the TANFESO Open Ear Clip is purple. Pick based on which look you'd rather wear daily — neither color affects the specs, sound or waterproofing.
does the LED digital display actually matter
It does if you hate guessing. The TOZO T21's display shows the battery level of each earbud and the case individually, and the TANFESO case also carries an LED display. Since neither product publishes a precise remaining-percentage readout in its specs, treat the display as a quick at-a-glance status check rather than a precise gauge.
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