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
Blue aluminium smartwatch with round AMOLED screen and silicone sport strap

allentian

allentian Tk21p Smart Watch Blue Medium 29-35mm 130g 15-21 Days

SKU CH-RZHJ-CZ2RR

A 130 g smart watch with a 29-35 mm AMOLED screen, blood-pressure, glucose and temperature sensors, and 15-21 day battery life

  • ColorBlue
  • SizeMedium
  • CompatibilityAndroid / IOS
  • Sports TeamNO
  • Non-invasive glucose, lipid and uric-acid monitoring for daily health insight
  • 15-21 day battery life keeps the watch running weeks between charges
  • AMOLED round display in 29-35 mm aluminium case for clear, lightweight wear
  • Life-waterproof design with magnetic charging suits sport and everyday use
  • Touch-and-button control plus Bluetooth calls, sleep, SpO₂ and temperature tracking

Blue Medium Smart Watch for Daily Health Tracking

The Allentian Tk21p is a wearable device designed for men who want continuous wellness data on their wrist. Its AMOLED round dial and aluminium case sit on a sporty silicone strap sized for 29-35mm wrists. The watch weighs 130g and delivers 15-21 days of battery life per magnetic charge. It suits users who prefer a single device for fitness metrics and smartphone notifications.

Check Phone OS and Charging Habit Before Buying

The unit pairs with Android and iOS handsets through the companion app for call alerts, message previews and remote camera control. Verify that your phone runs a supported operating system version so the Bluetooth link stays stable. The magnetic charging cable is proprietary, so plan to carry it on trips longer than the rated battery window. No extra sensors or bands are included in the package.

Included Cable and Manual Enable Immediate Setup

The box contains the watch, a magnetic data cable, a printed instruction manual and the retail packaging. The cable handles both power delivery and data sync for firmware updates. The manual walks through initial pairing, watch-face selection and the layout of touch-plus-button controls. With these items you can start tracking steps, heart rate, blood oxygen, body temperature and sleep cycles straight away.

Highlights

  • Non-invasive glucose, lipid and uric-acid monitoring for daily health insight
  • 15-21 day battery life keeps the watch running weeks between charges
  • AMOLED round display in 29-35 mm aluminium case for clear, lightweight wear
  • Life-waterproof design with magnetic charging suits sport and everyday use
  • Touch-and-button control plus Bluetooth calls, sleep, SpO₂ and temperature tracking

Specifications

ColorBlue
SizeMedium
CompatibilityAndroid / IOS
Sports TeamNO

Questions about this item

What comes in the box with the allentian Tk21p and do I need to buy a charger separately?

The package includes the smart watch, an instruction manual, a magnetic data cable and the box. The cable handles charging so no separate charger is required.

Which case diameter should I choose between 29 mm and 35 mm?

The watch case measures 29 to 35 mm; the medium size with silicone sport strap fits wrists that suit that range, so select the single medium option offered.

How long will the 15 to 21 day battery life last with daily heart rate and sleep tracking enabled?

With typical use including heart rate monitoring, sleep analysis and notifications, expect between 15 and 21 days per magnetic charge.

Also in this aisle

People compared these

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