BY-21 Bluetooth Heart Rate / Blood Pressure Monitor Smart Bracelet Health Tracker For iOS Android (Red)

US$ 29.09

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Nordic nRF51822 + Bluetooth 4.0 technology

Adopts Nordic nRF51822 and Bluetooth 4.0 technology that it can quickly and efficiently meet the needs of your life.

Heart rate monitor and arrhythmia alert

Measure the real-time heart rate value, it will remind with vibration if any abnormal.

Blood pressure test

Make manual or auto test for the user's blood pressure during sleep time.

Pedometer / Sleep monitoring / Sedentary reminder

Your private management expert, monitor the daily movement, take care of your health, monitor your sleep, remind you to have a rest and track your steps, mileage and calories for high quality sports.

Call / SMS reminder and Information push

Built-in vibration motor, it will remind you when coming a call or message, also display the caller name or tel. number. You can check the app information without taking out the phone.

Ultrasonic structure with IP67 waterproof standard.

Small body with big screen, supports vertical and horizontal two UI display methods.


Hardware Model: BY-21
Built-in chip type: Nordic nRF51822
Memory: 32KB + 256KB
Bluetooth version: V4.0
Waterproof rating: IP67
Functions Bluetooth sync: Phone call reminder, Message push
Health tracker: Heart rate monitor, Blood pressure test, Arrhythmia alert, Pedometer, Calorie consumption, Sedentary reminder, Sleep monitor
Other functions: Time, Alarm
Alert type: Vibration
Sensor: PD70-01C-TR7
Display Screen type: 0.96 inch OLED
Operating method: Touch button
Battery Battery type: Lithium-polymer
Battery capacity: 75mAh
Charging time: 1 hour
Features APP Name: wearfit2.0
Compatible OS: Android, iOS 
Compatability: Android 4.4 / iOS 8.0 and above systems
APP Language: Chinese, English, Russian, Portuguese, French, Italian, German, Korean, Japanese, Spanish Traditional English
Smartband Bnad Language:Chinese/English
Smartband Push Texs Languahe: Chinese, English, Russian, Portuguese, French, Italian, German, Korean, Japanese, Spanish Traditional English
Available color: Black, Blue, Red,Brown
Appearance Dial shape: Rectangle
Case material: Plastic
Band material: TPU
Package Contents 1 x BY-21 Smart Bracelet
1 x User Manual (Chinese/English)
1 x Gift Box


Package Details





Package Includes
1 x BY-21 Smart Bracelet,1 x User Manual (Chinese/English),1 x Gift Box