How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-03 · 8 min read · Independent comparison
• Tuanzi Sabbat E12 — biggest strength: real earbud stamina. A charging case that holds multiple extra charges for more than 30 hours of listening time, plus Bluetooth 5.0 that draws roughly half the power of the older 4.2 generation. It behaves like a dedicated pair of earbuds and nothing else.
• Tuanzi Sabbat E12 — biggest trade-off: no screen, no health tracking, no watch features. If you want a wrist device, this is not it. You also need to remember your own cable to top up the case.
• HYDZXINGW Watch — biggest strength: the 2-in-1 idea actually holds together. A 1.43-inch AMOLED touchscreen on your wrist, a storage bay that charges the earbuds automatically, magnetic charging for the watch itself, and health metrics on top.
• HYDZXINGW Watch — biggest trade-off: the earbuds only exist as part of the watch. Lose or damage them and you have a mid-size smartwatch with an empty storage bay — and the health data is explicitly labeled as reference-only, not a medical measurement.
• Who each pick is for: Tuanzi Sabbat E12 for someone who wants cheap TWS earbuds for music, calls and workouts without a second device on the wrist. HYDZXINGW Watch for someone who wants one thing to carry and charge, and who cares about steps, heart rate and sleep as much as sound.
The Sabbat E12 is the more traditional shape of the two: a pair of in-ear buds with rounded silicone tips, a charging case, and a control scheme built on taps rather than a screen. Each earbud is a dynamic driver rated 20 Hz to 20 kHz with 32 ohm impedance, and the description points to Qualcomm aptX audio and a 10mm biological fiber diaphragm. In plain terms, this is a product designed around one job — playing audio wirelessly and letting you answer calls — rather than around a feature list.
What it does best is endurance and simplicity. The case holds multiple additional charges for more than 30 hours of total listening, and a full case charge takes about an hour. Bluetooth 5.0 is the newer, more stable connection compared to 4.2, with lower power draw, and the buds pair automatically the moment you lift them out of the case. Once you've paired them a first time, each bud can also connect on its own, which is handy if you want one ear free while you work or walk.
Who should buy it: runners, commuters, gym-goers and anyone who wants earbuds that disappear into a pocket and keep going for days of short sessions. It's also a sensible pick for a teenager or a first pair of true wireless buds, since the fit is silicone-tipped and the operation is close to self-explanatory. Who should skip it: anyone who wants a screen, notifications on the wrist, step counts or sleep tracking. There's none of that here, and there's no reason to expect it. If your phone is already the hub of your day and you only need sound, this is the simpler, more focused buy.
HYDZXINGW Watch: Who It's For
The HYDZXINGW X20 is a different species of product. It's a round black smartwatch with a silicone band, a 1.43-inch AMOLED full-touch display, and — the whole point of the design — a built-in storage bay for a pair of TWS earbuds. The buds sit in the watch when you're not using them and charge there automatically, so you never have to hunt for a separate case or a separate cable for the headphones.
The screen is the center of the experience. It runs a Watch OS 7-style interface, supports multiple watch faces, can read SMS messages, accept or reject calls from the wrist, and even act as a remote shutter for your phone camera. It also supports taking photos and setting them as background images. The watch reports a 240 mAh lithium-polymer battery with an average life of about 10 days and a 2.5-hour charge time via a magnetic charging cable that works across iOS, Android and Windows phones.
On the health side, the X20 tracks mileage, heart rate, sedentary state, calories, exercise and sleep, and it supports GPS via your smartphone rather than on its own. It's rated waterproof to 1 meter, which covers splashes, rain and hand-washing but is not a diving rating. The earbuds themselves are Bluetooth 5.0, pair automatically, support voice assistant commands, touch control, active mute and noise reduction, and are described as high-definition for calls.
I want to be straight about one thing, because the manufacturer is: the health app is not a medical device and the data is for reference only, not clinical diagnosis or treatment. Treat the numbers as trends to nudge your habits, not as measurements to act on medically.
Who should buy it: someone who hates carrying two things. If you jog, take calls on the move, and want your earbuds to live inside your watch, the 2-in-1 format is genuinely convenient, and a 10-day watch battery means the watch is still useful on the days you leave the buds at home. Who should skip it: audiophiles chasing the best possible sound, anyone who wants a slim band-style tracker, and anyone who wants their earbuds to work independently of a watch. If the buds fail, your audio setup goes with them.
• Best for battery life on the audio side → Tuanzi Sabbat E12. More than 30 hours of listening time through the case versus a 10-day watch battery that has to power a screen, sensors and charging.
• Best for one-device convenience → HYDZXINGW Watch. Watch, earbuds and earbud charging in a single object you strap on.
• Best for fitness and health tracking → HYDZXINGW Watch. Heart rate, mileage, calories, sedentary reminders and sleep records are all part of the package.
• Best for pure music and call focus → Tuanzi Sabbat E12. Dynamic drivers, 20 Hz–20 kHz range, aptX audio and a 10mm biological fiber diaphragm, with nothing competing for attention.
• Best for calls and voice assistants → a tie, with different methods. Sabbat E12 gives you one-tap Siri or Android assistant access with a long press; the X20 puts accept/reject on the screen and voice assistant in the buds.
• Best for workouts in the rain or at the sink → HYDZXINGW Watch. The 1-meter water resistance rating is stated; the Sabbat E12 sheet does not list one, so don't assume it.
• Best for someone who wants zero learning curve → Tuanzi Sabbat E12. Click to play, double-click to skip, triple-tap for volume. No menus, no app, no dials.
• Best for a phone-first user who wants a wrist screen → HYDZXINGW Watch. Message reading, camera remote and dial switching all live on the 1.43-inch AMOLED panel.
If I were buying for myself, I'd take the Tuanzi Sabbat E12. In my opinion, cheap TWS earbuds should be judged on the things that actually annoy you day to day — do they stay paired, do they last, can you control them without looking — and on those three the E12 is the cleaner answer. More than 30 hours through the case, Bluetooth 5.0, automatic pairing and one-tap assistant access cover the whole job. I'd only switch to the HYDZXINGW Watch if I genuinely wanted the watch: the screen, the health metrics and the buds-charging-in-the-watch trick. That's a real convenience, but it's a wearable purchase first and an earbuds purchase second. Pick based on which of those two you actually are.
FAQ
what is tws earbuds
what is tws earbuds means
It means the left and right buds are independent and talk to your phone wirelessly rather than through a wire. In practice you get automatic pairing when you remove them, individual use of one bud, and a charging case — which is exactly how the Sabbat E12 is described.
how much is tws earbuds
There's no single answer, because true wireless earbuds span a very wide range depending on brand, drivers and features. What matters more than the number is what you're paying for: audio and battery in the Sabbat E12, or audio plus a screen and health tracking in the X20. Check the current price on Amazon before deciding.
how to tws earbuds
Pair once, then let them do the rest. With the Sabbat E12 you take the buds out of the case, they power on and connect automatically, and each bud can also pair on its own after that first setup. The X20 works the same way, with the buds charging whenever they sit in the watch's storage bay.
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