Fitness Tracker

B21

A lightweight smart tracker (25g) that fits genuine WHOOP 5.0 replacement straps — woven fabric or silicone, 

strap size 110–220mm. Built with a zinc-alloy frame, PC case,

 5ATM water resistance and stainless-steel ECG electrode pads.

Health Monitoring: Heart rate & HRV, SpO₂ (blood oxygen), blood pressure, stress, body temperature, 

sleep & step count, calorie, blood glucose, blood components (uric acid, blood lipids), body composition

 (body fat), metabolic monitoring, and ECG with diagnosis (32 types of risk assessment).

Safety & Alerts: SOS, fall detection reminder, high heart rate & low oxygen alerts, sedentary/medication/

travel reminders, exercise goal reminder.

Features: Multi-sport modes, workout records, female cycle tracking, Find My Watch, remote camera.

Hardware: BLE 5.3 / BT 3.0, PPG sensor, 160mAh battery, 7 days normal / 30 days standby use, 

magnetic charging (<2.5h).

Compatibility: iOS 13.0+ / Android 8.0+. Works with the G BAND APP, OTA upgrade supported.


Specification
Products Description

CPU: AB2026

Bluetooth: BLE 5.4

Mic: Without MIC

G-Sensor: DA267

HR Sensor: HX3917

Battery: 30mAh,Working time 7-10days,

Standby Time 15-20days

App Name: G Band

Weight: Steel buckle 16g /Magnetic buckle 20g

Material: Zinc alloy+PC For Body &

Silicone or stainless For Strap