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Round black smartwatch with aluminium case and silicone strap

allentian

allentian C21pro 1.39-Inch Smart Watch Black 28mm 170g

SKU CH-NEE2-8WEXP

Tracks steps, sleep and health metrics on a 1.39-inch touchscreen with magnetic charging and life waterproofing

  • ColorBlack
  • SizeMedium
  • CompatibilityAndroid / IOS
  • Sports TeamNO

Color Black

  • Large 1.39-inch TFT screen for clear viewing
  • Bluetooth calling lets you answer from the wrist
  • Health sensors track heart rate, blood oxygen and sleep
  • Water-resistant build suits outdoor and daily wear
  • Up to 7 days battery life between magnetic charges

1.39-Inch Smart Watch for Daily Health Tracking

The allentian C21pro is a wearable device with a 1.39-inch TFT round dial housed in an aluminum alloy case measuring 28 mm. It weighs 170 g and uses a silicone strap with a classic buckle. Operation combines touch input and a physical button, while magnetic charging keeps the battery running for less than seven days. The watch pairs with Android and iOS phones for notifications and basic smart features.

Suited for Casual Fitness and Connected Alerts

This model fits users who want step counting, sleep monitoring, heart-rate and blood-oxygen spot checks, plus call and message reminders on the wrist. Life-waterproof rating handles splashes and sweat but not swimming or diving. Buyers who need built-in GPS, onboard music storage, third-party app ecosystems or swim-proof water resistance should look at something else.

Check Phone OS and Charging Habits Before Buying

Verify your phone runs a compatible Android or iOS version for the companion app. The magnetic cable is proprietary, so keep it accessible for top-ups every few days. Ensure the 28 mm case and silicone band feel comfortable on your wrist, and confirm that life-waterproof protection matches your actual exposure to water.

Highlights

  • Large 1.39-inch TFT screen for clear viewing
  • Bluetooth calling lets you answer from the wrist
  • Health sensors track heart rate, blood oxygen and sleep
  • Water-resistant build suits outdoor and daily wear
  • Up to 7 days battery life between magnetic charges

Specifications

ColorBlack
SizeMedium
CompatibilityAndroid / IOS
Sports TeamNO

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the allentian C21pro need an Android phone to pair with?

Yes, the compatible platform is Android; the watch pairs through its Bluetooth calling function and the companion app on the phone.

Will the 28 mm case and silicone strap fit the same wrist as my older 22 mm band?

The case diameter is 28 mm with a classic buckle strap; you can fasten the silicone band to match your wrist size.

How can I confirm the magnetic charger is working after I connect it?

The TFT screen will show a charging animation and the battery icon will rise toward the less than 7 day life indicator.

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