If you want a compact smartwatch-and-earbuds combination for kids wireless, choose Tuanzi X8S; if you need purpose-built, water-resistant headphones with onboard music for swimming, choose SAMVEK Swimming Headphones Underwater.
The key difference is what each device is designed to do: the Tuanzi combines a watch with Bluetooth earbuds, while SAMVEK focuses on open-ear listening for workouts, including swimming. I’d decide based on whether the watch functions matter more than dedicated underwater playback.
Tuanzi X8S vs SAMVEK Swimming Headphones Underwater at a Glance
• Tuanzi X8S strength: combines a smartwatch and Bluetooth earbuds, with activity tracking, alerts, and call controls. Trade-off: its listed music playback time is 3.5 hours, and it is not presented as a swimming headphone.
• Choose Tuanzi X8S if you want one wearable for watch functions and occasional calls or music.
• Choose SAMVEK if your priority is listening during water-based workouts while keeping your ears open to surrounding sounds.
Tuanzi X8S combines a touchscreen smartwatch with Bluetooth earbuds. The watch has a 1.69-inch color screen and a 250 mAh battery, while the listed battery information gives an average life of 24 hours. Its watch functions include activity records for steps, calories, and distance, along with health monitoring, alerts, an alarm, and multiple sport modes. That mix makes it more of a daily wearable than a dedicated swimming audio device.
The earbuds support Bluetooth calling and music playback. The listed compatibility is Android 4.4 or later and iOS 8.0 or later. Button controls handle calls and music, and four presses wake Siri. That could be useful when a phone is inconvenient to reach, but the earbuds’ stated music playback time is 3.5 hours on a full charge. I would treat that as a limitation for longer listening sessions rather than assume the watch’s battery figure applies to the earbuds.
For the for kids wireless use case, this two-in-one setup may appeal to someone looking for a watch and earbuds in one product, especially when activity records, time, and information alerts are useful. It is not specifically described as a children’s headset, and the listed water-resistance depth is 1 meter, so I would not choose it as swimming gear. The watch screen and call features also make it a more feature-rich option than a simple audio headset.
Who should skip it: Skip the Tuanzi if your main requirement is music during swimming or you need more than 3.5 hours of listed earbud playback.
SAMVEK is built around sports listening, with an open-ear design and bone-conduction drivers. Its IP68 rating is the clearest distinction from the Tuanzi for water-related use. The open-ear layout is also intended to let the wearer remain aware of nearby sounds, which may suit workouts where hearing the environment matters. Its controls are physical buttons rather than a touchscreen.
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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-21 · 7 min read · Independent comparison
The product weighs 32 grams and has a listed average battery life of eight hours, with a two-hour charging time. Those details point to a lightweight sports headset that can cover longer sessions than the Tuanzi earbuds’ stated music time. They do not make it a watch or a call-and-activity-tracking package, though. SAMVEK is the more focused choice if the main job is audio during land workouts and swims.
Who should skip it: Skip SAMVEK if you want smartwatch tracking, watch notifications, or Bluetooth streaming while submerged.
Side-by-Side: Which Should You Choose?
• Best for a combined watch and earbuds → Tuanzi X8S. It pairs a touchscreen watch with Bluetooth earbuds, plus activity records, alerts, an alarm, and call controls.
• Best for swimming workouts → SAMVEK. It has an IP68 rating and an MP3 mode for underwater listening; Bluetooth needs to be replaced by stored music in the water.
• Best for watch-based activity details → Tuanzi X8S. It lists step, calorie, and distance records, along with multiple sport modes and health monitoring.
• Best for open-ear awareness → SAMVEK. Its open-ear bone-conduction design is meant to preserve awareness of surrounding sounds.
• Best for calls and phone voice-assistant controls → Tuanzi X8S. It supports Bluetooth calls and includes a four-press Siri wake-up control.
• Best for longer stated audio battery life → SAMVEK. Its average battery life is listed as eight hours; Tuanzi’s earbuds are listed for 3.5 hours of music playback.
• Best for a one-device wearable setup → Tuanzi X8S. The watch and earbuds are combined in one product, though the watch itself is not a substitute for swim-focused headphones.
I would choose SAMVEK if my primary goal were swimming or sports listening: IP68 protection, open-ear design, and onboard MP3 storage are directly relevant to that use. For the for kids wireless search, though, I would first decide whether the priority is a watch-and-earbuds combination or a dedicated sports headset; neither product is explicitly described as designed for children. If I wanted calls, activity records, and watch functions alongside earbuds, I’d choose Tuanzi X8S instead.
Before choosing, separate two questions: where you plan to listen and what else you want the device to do. For pool use, SAMVEK’s MP3 mode is central because Bluetooth is blocked underwater. You would need to use music stored on its 32GB memory while swimming, rather than expect a phone connection to continue beneath the surface. For listening on land, it also supports Bluetooth 5.4.
Fit and listening style matter, too. SAMVEK’s open-ear design and hook-style placement differ from conventional in-ear earbuds, while Tuanzi’s package combines Bluetooth earbuds with a watch. Neither data sheet establishes a particular fit for small ears, so I would not assume either one is the best voice assistant kids headset for small ears. Tuanzi does offer a Siri wake-up control, but that alone does not tell us how comfortably it will fit a particular child.
Likewise, shoppers looking for the best in ear earbuds for teachers should note that SAMVEK is described as open-ear, not in-ear, and Tuanzi is a watch-and-earbuds combination rather than a classroom headset. Neither product is listed as foldable, so the best foldable headset search is not a direct match for either option. If portability through folding is essential, these specifications do not identify a winner on that point.
If price affects your decision, check the current price on Amazon using the page’s button. I would compare that against the features you will use, not treat either device as a direct substitute for the other: one emphasizes smartwatch functions, and the other emphasizes sports and swimming audio.
FAQ
No. The product information says Bluetooth signals are blocked underwater, so use MP3 mode for swimming. Bluetooth 5.4 is for wireless listening when the connection can reach the headphones.
The listing gives a water-resistance depth of 1 meter, but does not describe the product as swimming headphones. For underwater listening, SAMVEK is the more clearly specified option because it has an IP68 rating and MP3 playback.
SAMVEK lists an average battery life of eight hours. Tuanzi’s earbuds are listed for 3.5 hours of music playback on a full charge; the watch’s 24-hour average battery-life figure is separate.
Tuanzi X8S is the more suitable match for those needs. It lists Bluetooth calling, call reminders and controls, information alerts, an alarm, activity records, and a touchscreen watch. SAMVEK is focused on sports audio rather than smartwatch features.
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