We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-20 · 7 min read · Independent comparison
If you want a single wearable that doubles as a watch and a pair of earbuds with on-wrist music storage and local playback, choose Tuanzi GT100; if you need open-ear earbuds that keep you aware of traffic and training partners while you run, choose Raycon Fitness Open Ear. These two products only look like competitors on the surface. One is a hybrid watch-and-buds system. The other is a purpose-built open-ear audio device. Pick based on how you actually move, not on which one sounds more futuristic.
• Tuanzi GT100's biggest strength: a true 2-in-1 setup — a 1.43-inch round smartwatch with TWS earbuds stored in the watch itself, plus 128MB of onboard music memory and a 400mAh battery rated for around 15 days of average use.
• Tuanzi GT100's biggest trade-off: it's a hybrid, so it spreads its effort across watch functions, health tracking and earbuds — and the earbuds are rated for roughly 5 hours per play session, well short of a dedicated audio product.
• Raycon Fitness Open Ear's biggest strength: open-ear design with rotating, multi-axis ear hooks, a 40-hour total battery figure (8 hours per charge plus 32 in the case) and multipoint Bluetooth pairing.
• Raycon Fitness Open Ear's biggest trade-off: it's audio only. No watch face, no health sensors, no step tracking, and "noise control: None" means it filters nothing out by design.
• Who Tuanzi GT100 is for: someone who wants one gadget on their wrist that plays music, takes calls and tracks heart rate, blood pressure, SpO2 and sleep.
• Who Raycon Fitness Open Ear is for: runners, cyclists and gym-goers who need to hear their surroundings and want earbuds that won't budge during hard movement.
The GT100 is a genuinely unusual piece of hardware. The watch body holds the earbuds, so you're not carrying a separate case in your pocket or bag. The watch side runs a 1.43-inch round IPS display at a 466 x 466 resolution with full touch, an aluminum case, a silicone band and a black finish. It's IP67-rated for water, sweat, dust and shock resistance, so splashes and hard training sessions aren't a problem. The band is 20mm wide and 26cm long, and the whole unit weighs 240g.
Then there's the audio half. The earbuds use graphene drivers, hide a sweat-proof design around the charging contacts to stop sweat from corroding the pins, and give you about 5 hours of play time per charge. The 128MB of onboard memory is the sleeper feature: it can store roughly 30–50 songs and play them locally, so you can leave your phone behind on a run and still have music. Bluetooth calling works in dual mode — answer on the watch or switch to the earbuds, whichever is easier.
Buy it if you want one device covering music, calls, notifications and health metrics, and you like the idea of earbuds that live inside your watch. Skip it if you're a serious runner who needs to hear traffic, or if you want marathon-length listening sessions from a single charge — five hours per earbud session is the ceiling here.
Raycon Fitness Open Ear: Who It's For
Raycon built this one around a single idea: stay aware while you train. The open-ear hook design sits outside your ear canal rather than sealing it, so ambient sound comes through — traffic, gym announcements, a training partner's voice. If you've ever pulled an earbud out at a crosswalk, you already understand the appeal.
The fit engineering is the standout detail in the spec sheet. The ear hooks rotate on two axes and are multi-angular, so you can dial in a position that stays put through running, lifting or stretching. Raycon also describes flexible earhooks that adapt to different ear shapes, which matters because open-ear hooks live or die on how well they grip. They're lightweight (0.19 kg for the package), sweat-resistant, and made of plastic with a mint finish.
Audio runs through a dynamic driver covering 20Hz–20,000Hz. Raycon mentions Digital Signal Processing that amplifies your voice and reduces background noise on calls — useful if you take calls mid-run. Battery is the headline number: 8 hours of continuous playback plus 32 more from the charging case, for 40 hours total. The case is pocketable. Bluetooth 5 handles the connection, multipoint lets you pair two devices and switch between them instantly, and controls are voice-based.
One thing to be clear about: "noise control: None" is not a flaw here, it's the entire point. These are awareness-first earbuds. If you want isolation, this is the wrong product. Buy it if you run outdoors, cycle, lift in a busy gym or want one pair of earbuds for workouts and calls. Skip it if you need a watch, health tracking, or any form of passive noise blocking.
• Best for all-in-one convenience → Tuanzi GT100. Watch, earbuds, calls and health tracking in one item with no separate case to lose.
• Best for outdoor safety and awareness → Raycon Fitness Open Ear. Open-ear design keeps you tuned into your surroundings by design.
• Best for battery life → Raycon Fitness Open Ear. 40 hours total (8 + 32 in the case) versus roughly 5 hours per earbud session on the GT100.
• Best for health monitoring → Tuanzi GT100. Heart rate, blood pressure, SpO2 and sleep tracking, plus steps and calories.
• Best for phone-free listening → Tuanzi GT100. The 128MB local player holds about 30–50 songs, so you can run without your phone.
• Best for long training sessions → Raycon Fitness Open Ear. Eight hours per charge covers a marathon-plus; the GT100's earbuds will need a recharge mid-session.
• Best for multi-device switching → Raycon Fitness Open Ear. Multipoint pairing lets you jump between a workout playlist and a work call instantly.
• Best for notifications and daily-wear utility → Tuanzi GT100. App mirroring, alarms, weather, camera remote and Siri support in one wrist device.
In my opinion, the honest answer is that these aren't really substitutes — they solve different problems, and that's the whole point of this comparison. If I had to pick one for the average person who wants maximum function from a single purchase, I'd buy the Tuanzi GT100. It does more jobs, and the local music storage plus health tracking make it the more versatile daily device. But if your priority is running, cycling or training while staying aware of your environment, I'd choose the Raycon Fitness Open Ear without hesitation — the open-ear design, rotating hooks and 40-hour total battery are exactly what that use case demands. Decide which job matters more, and the choice makes itself.
FAQ
On paper, the Raycon wins clearly: 40 hours total (8 per charge plus 32 in the case). The GT100's watch is rated around 15 days of average use, but its earbuds run about 5 hours per session, so heavy music use drains them much faster than the Raycon.
No — and that's intentional. The spec sheet lists noise control as "None," because the open-ear design is meant to let ambient sound in. That makes them safer for outdoor running and cycling, but a poor fit if you want isolation on a plane or in a loud office.
Yes. The watch has 128MB of onboard player memory and can store roughly 30–50 songs, so you can play local music directly from the watch. That's a real advantage for phone-free workouts, something the Raycon earbuds don't offer since they rely on a Bluetooth source.
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