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
Black smartwatch with 2.09-inch screen, titanium alloy case, silicone sport strap

allentian

allentian C900 Ultra Smart Watch 2.09-Inch Black

SKU CH-WFE2-WHZ7V

A 2.09-inch smartwatch with Bluetooth calling, heart-rate and blood-pressure monitoring, sleep tracking, step counting, NFC, remote selfie control and voice-assistant support.

  • ColorBlack
  • SizeMedium
  • CompatibilityAndroid / IOS
  • Sports TeamNO
  • Large 2.09-inch TFT screen for clear viewing
  • Bluetooth calling and NFC for contactless convenience
  • Heart-rate, blood-pressure and sleep monitoring for health insight
  • Wireless charging with up to 7-day battery life
  • Titanium-alloy case with sporty silicone strap for durability

What the C900 Ultra Smart Watch does

The allentian C900 Ultra is a wrist-worn wearable with a 2.09-inch TFT screen and titanium alloy case. It targets users who want health tracking, Bluetooth calling and smart notifications from a single device. The silicone sport strap and touch-plus-button operation suit daily wear and exercise alike.

Thermals noise and power draw in normal use

The watch weighs 180 g and runs on a wireless-charging battery rated for less than seven days of typical use. Life-waterproof construction resists sweat and rain without active cooling or audible noise. Wireless range spans 5 m to 10 m for stable phone connectivity during workouts.

Build integration what it needs and what it frees up

Pairing requires an Android or iOS handset within the 10 m Bluetooth envelope; no extra hub or proprietary charger is needed beyond the supplied wireless cable. NFC, remote selfie control and voice-assistant access replace separate cards, remotes and speakers. Buyers who need standalone GPS, cellular connectivity or third-party app ecosystems will not find those features here.

Highlights

  • Large 2.09-inch TFT screen for clear viewing
  • Bluetooth calling and NFC for contactless convenience
  • Heart-rate, blood-pressure and sleep monitoring for health insight
  • Wireless charging with up to 7-day battery life
  • Titanium-alloy case with sporty silicone strap for durability

Specifications

ColorBlack
SizeMedium
CompatibilityAndroid / IOS
Sports TeamNO

Questions about this item

How do I pair the C900 Ultra with my phone for Bluetooth calling?

Enable Bluetooth on your Android or iOS device, open the companion app, and follow the on-screen steps to bind the watch within the 5‑10 m wireless range.

What ongoing care does the silicone strap and wireless charging require?

Rinse the silicone band with fresh water after sweaty workouts, dry it thoroughly, and keep the wireless charging surface clean for reliable power transfer.

How long will the battery last with daily heart‑rate, blood‑pressure and call use?

The rated life is under 7 days; heavy Bluetooth calling and continuous health sensors will reduce that toward the lower end of the range.

Also in this aisle

People compared these

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