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Grey circular smart bracelet with 1.3 inch touchscreen and stainless steel strap

siroka

siroka Smart Heart Rate Bracelet 1.3" 240*240 IP67 170 mAh

SKU CH-KZD8-ADRDE

Tracks heart rate, blood oxygen and sleep on a 1.3" 240×240 touchscreen with IP67 water resistance and 170 mAh battery

  • ColorGray
  • TypeSmart Watch
  • SizeMedium
  • BandGray Sport Band
  • CompatibilityAndroid / IOS
  • OS CompatibilityAndroid / IOS

Size Medium

  • Medium
  • N/A

Struck-through versions exist but are not stocked here.

Band Gray Sport Band

  • Bright Red Modern Buckle (Medium 145-165mm)
  • Gray Sport Band
  • Green Sport Band

Struck-through versions exist but are not stocked here.

  • Real-time heart-rate tracking with HRS3300 sensor
  • Blood-pressure and SpO₂ readings on wrist
  • IP67 water resistance for daily wear
  • 3" 240×240 full-touch colour display
  • 170 mAh battery gives 7–10 day standby

siroka 1.3" Heart Rate Bracelet

The siroka Smart Heart Rate Bracelet is a wearable health tracker built around a 1.3 inch full-circle TFT display with 240 by 240 pixel resolution. It runs on a Nordic nRF52832 main controller and a Bosch BMA421 motion sensor. A Tianyi Hexin HRS3300 sensor handles continuous heart rate measurement alongside blood pressure and blood oxygen tracking. The unit weighs 122 grams and carries an IP67 waterproof rating.

Suits users wanting all-day health metrics

This bracelet fits people who want heart rate, blood oxygen, sleep stages and activity data on a single wristband with multi-sport modes and smartphone notifications. It is not for buyers who need built-in GPS mapping, contactless payments, cellular connectivity or third-party app ecosystems. The proprietary app and magnetic charger also mean it will not suit users committed to a different platform.

170 mAh battery delivers 7 to 10 day standby

A 170 milliampere-hour polymer lithium-ion cell powers the device for roughly one week to ten days between charges. Replenishing the battery takes about two hours using the supplied USB magnetic cable. If your routine requires several weeks of operation without recharging, this capacity will fall short.

Highlights

  • Real-time heart-rate tracking with HRS3300 sensor
  • Blood-pressure and SpO₂ readings on wrist
  • IP67 water resistance for daily wear
  • 3" 240×240 full-touch colour display
  • 170 mAh battery gives 7–10 day standby

Specifications

ColorGray
TypeSmart Watch
SizeMedium
BandGray Sport Band
CompatibilityAndroid / IOS
OS CompatibilityAndroid / IOS

Questions about this item

Do I need a smartphone running iOS 9.0 or Android 4.4 to use the bracelet?

Yes, the companion app requires iOS 9.0 or above and Android 4.4 or above, so your phone must meet at least one of those versions.

Will the 1.3 inch 240 by 240 display stay readable if I keep using an older phone with a smaller screen?

The bracelet has its own full-circle TFT touchscreen with side button, so readability does not depend on your phone’s display size.

How can I confirm the HRS3300 heart rate sensor is working after I put the band on?

Open the app’s real-time heart rate view; a live BPM reading that changes with activity shows the sensor is functioning.

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