We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver round smartwatch on a dark sporty silicone strap, aluminium case, 1.39-inch TFT screen, 130g

allentian

allentian C21pro Smart Watch 1.39-Inch Silver 130g

SKU CH-5F42-T3A3W

A 1.39-inch smartwatch with Bluetooth calling, heart-rate, blood-pressure and blood-oxygen monitoring, sleep tracking and waterproof construction for swimming

  • ColorSilver
  • SizeMedium
  • CompatibilityAndroid / IOS
  • Sports TeamNO
  • 39-inch TFT display shows data clearly
  • 130 g aluminium case keeps weight low on the wrist
  • Bluetooth calling lets you answer without reaching for your phone
  • Heart-rate, blood-pressure and blood-oxygen sensors track health metrics daily
  • Waterproof for swimming so the watch survives pool sessions and rain

Allentian C21pro Smart Watch 1.39-Inch

The Allentian C21pro is a new wearable device with a 1.39-inch TFT round dial housed in an aluminium case measuring 29 to 35 mm. It weighs 130 g and uses a silicone sport strap with magnetic charging. The watch runs via touch control and connects through Bluetooth to Android and iOS phones.

Suits users wanting call handling

Buyers who need built-in GPS mapping or onboard music storage should look at other devices. The watch handles Bluetooth calling, heart rate, blood pressure, blood oxygen and sleep tracking, plus step counting and remote camera control. It is rated waterproof for swimming and delivers smart reminders for daily use.

Check that your phone runs Android

Verify the 29 to 35 mm case diameter fits your wrist comfortably before ordering. The package includes the watch, a manual, a magnetic data cable and a box. No additional sensors or proprietary apps are required for the listed functions.

Highlights

  • 39-inch TFT display shows data clearly
  • 130 g aluminium case keeps weight low on the wrist
  • Bluetooth calling lets you answer without reaching for your phone
  • Heart-rate, blood-pressure and blood-oxygen sensors track health metrics daily
  • Waterproof for swimming so the watch survives pool sessions and rain

Specifications

ColorSilver
SizeMedium
CompatibilityAndroid / IOS
Sports TeamNO

Questions about this item

Does the watch need a phone running Android or iOS to pair and show notifications?

Yes, the watch pairs over Bluetooth with a smartphone running Android or iOS so that calls, messages and app alerts appear on the 1.39-inch screen.

If I keep an older Android phone, will the watch still track steps, heart rate and blood pressure on its own?

The watch records steps, heart rate, blood pressure and blood oxygen locally, then syncs the data when it reconnects to the older Android handset via Bluetooth.

After pairing, how can I confirm the heart-rate sensor and Bluetooth calling are working correctly?

Open the heart-rate view on the 1.39-inch TFT display to see a live reading, then place a test call from the paired phone and verify audio routes through the watch speaker and microphone.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.